s-Block Elements : India Study Solution Test Series, Chemistry objective questions for JEE, NEET, other admission tests

s-Block Elements (Alkali Metals, Alkaline Earth Metals)

Chemistry India Study Solution Test Series (Confidence Booster)

NEET, JEE Main, Advanced, IIT, AIIMS, NTSE | Engineering, BDS, MBBS Admission Test

Welcome guys to your own site India Study Solution

Here we bring you a new series of practice questions from chemistry: s-Block Elements or Alkali Metals (Group 1 elements) and Alkaline Earth Metals (Group 2 elements).

Each set comprising carefully selected, 10 MCQ questions with hints & solutions (given at the end) from our Chemistry Solutions exclusively from Group-I and Group-II elements of Periodic Table.

In each set you will find a combination of typically important some basic and also advanced level questions very helpful in the preparation of NEET-UG, JEE Main & Advanced (IIT) AIIMS, IMS BHU, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Please scroll down to find NEET and JEE syllabus of s-Block elements.

Chemistry Practice Questions: s-Block Elements

(Group 1 Elements: Alkali Metals; Group 2 Elements: Alkaline Earth Metals)

India Study Solution MCQ Test Series – Set 1 (Q. No 1-10)

Question 1: Among the alkaline earth metals, the element forming predominantly covalent compound is:

a. Ba

b. Sr

c. Ca

d. Be

Question 2: C_sOH is

a. Strongly basic

b. Weakly

c. Slightly acidic

d. Amphoteric

Question 3: Hydrogen is prepared from H₂O by adding

a. Ca, which acts as reducing agent

b. Al, which acts as oxidising agent

c. Ag, which acts as reducing agent

d. Au, which acts as oxidising agent

Question 4: Which of the following statement is incorrect?

a. Mg and Ca both impact characteristic colour to the flame.

b. The metallic radius of Na is greater than that of Mg

c. Metallic bond of Mg is stronger than the metallic bond in Na

d. Melting point of Mg is greater than melting point of Ca.

Question 5: Based on lattice energy and other considerations which one of the following alkali metal chloride is expected to have highest melting point?

a. LiCl

b. NaCl

c. KCl

d. RbCl

Question 6: Which of the following has lowest melting point?

a. Li

b. Na

c. K

d. Cs

Question 7: Which of the following metals is used for drying organic solvents?

a. Magnesium

b. Sodium

c. Platinum

d. Nickel

Question 8: Select the incorrect option.

a. Sodium peroxide dissolves in water giving H₂O₂ and NaOH.

b. Both LiNO₃ and NaNO₃ on heating separately decompose and each liberates two gases NO₂ and O₂.

c. Solvay process cannot be used for the manufacture of potassium hydrogen carbonate.

d. Alkali metals are prepared only by the electrolysis of their fused chlorides.

Question 9: Which of the following element is responsible for oxidation of water to O₂ in biological processes?

a. Cu

b. Mo

c. Fe

d. Mn

Question 10: The incorrect statement among the following is:

a. Beryllium hydroxide is amphoteric in nature.

b. Solubility of sulphates of second group elements decreases down the group.

c. Reducing power of hydride of alkali metal decreases down the group.

d. Beryllium has diagonal relationship with aluminium.

s-Block Elements (Syllabus for NEET and JEE):

General characteristics, electronic configuration, occurrence, anomalous properties of the first element of each group, diagonal relationship, trends in the variation of properties (such as ionization enthalpy, atomic and ionic radii), trends in chemical reactivity with oxygen, water, hydrogen and halogens; uses of the compounds of Group I Elements (Alkali Metals) and Group II Elements (Alkaline Earth Metals). Preparation and Properties of Some important Compounds: sodium carbonate, sodium chloride, sodium hydroxide and sodium hydrogen carbonate, biological importance of sodium and potassium. Anomalous behaviour of beryllium. Industrial use lime and limestone, biological importance of Mg and Ca.

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India Study Solution - Hints and Solutions Chemistry MCQ Test Series

s-Block Elements

(Group 1 Elements: Alkali Metals; Group 2 Elements: Alkaline Earth Metals)

Solutions of Chemistry Test Series (MCQ) – Set 1 (Q. No.1–10)

https://www.indiastudysolution.com

Answer 1: d. (Hint: Be has higher polarising power on account of smallest size of atom).

Answer 2: a. Answer 3: a.

Answer 4: a. (Hint: Mg does not impact colour to the flame but sodium gives golden yellow colour).

Answer 5: b. (Hint: On the basis of lattice energy, the melting point decreases in the alkali group as lattice energy decreases with the increase of the atomic number. However, LiCl has covalent character due to very small size of Li⁺ ion. Hence, melting point of NaCl is highest among the above chlorides).

Answer 6: d. (Hint: The metallic bond is purely the electric attraction between the mobile electrons and positive part of the atom, the kernel. This electrical attraction depends upon the (i) number of mobile electrons per atom and (ii) the size of the atom. The strength of metallic bond is weakest in Cs metallic lattice amongst these elements because of largest atomic radius).

Answer 7: b. Answer 8: b. Answer 9: d.

Answer 10: c. (Hint:

a. Beryllium hydroxide is amphoteric in nature as it reacts with acid and alkali both.

Be(OH)₂ + 2OH → [Be(OH)₄]^2- (beryllate ion)

Be(OH)₂ + 2HCl + 2H₂O → [Be(OH₂)₄]Cl₂.

b. The solubility of the alkaline earth metal sulphate decreases down the group from Be to Ba. This is because of the fact that down the group with increasing size of cation the lattice energy as well as hydration energy also decrease but the change in hydration energy is more as compare that of lattice energy.

c. Down the group, the bond dissociation enthalpies decrease from LiH to CsH. So reducing power of hydride of alkali metal increases down the group.

d. The ionic radius of Be²⁺ is estimated to be 31 pm; the charge/radius ratio is nearly the same as that of the Al³⁺ ion. Hence, beryllium has diagonal relationship with aluminium.

So, option c. is incorrect).

 s-Block Elements (Alkali and Alkaline Earth Metals): More questions to follow

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Thermodynamics - India Study Solution Test Series, Chemistry objective questions for NEET, JEE Main other entrance exams

THERMODYNAMICS

Chemistry India Study Solution Test Series (Confidence Booster)

NEET, JEE Main, JEE Advanced, IIT, AIIMS, NTSE | MBBS, BDS Admission Test

Welcome guys to your own site India Study Solution

Below you will get carefully selected, 10 MCQ practice questions in our each Test Series with hints & solutions (given at the end) from our Chemistry Solutions exclusively from - Thermodynamics, Thermo Chemistry.

Each series or set is a combination of 10 typically important some basic and also advanced level questions for NEET-UG, JEE Main & Advanced (IIT) AIIMS, IMS BHU, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Please scroll down for NEET and JEE syllabus of Thermodynamics chapter.

Chemistry Practice Questions: Thermodynamics (Thermo chemistry)

MCQ Test Series – Set 2 (Q. No 11-20)

Question 11: A process in which no heat change takes place is called

a. An isothermal process

b. An adiabatic process

c. An isobaric process

d. An isochoric process 

Question 12: When a solid melts there is

a. An increase in enthalpy

b. A decrease in enthalpy

c. No change in enthalpy

d. A decrease in internal energy

Question 13: The change in enthalpy that takes place when one mole of the compound is formed from its elements is called

a. Heat of formation

b. Heat of fusion

c. Heat of combustion

d. Heat of sublimation

Question 14: Hess’s law states that

a. The standard enthalpy of an overall reaction is the sum of the enthalpy changes in individual reaction

b. Enthalpy of formation of compound is same as the enthalpy of decomposition of the compound into constituent elements, but with opposite sign

c. At constant temperature the pressure of a gas is inversely proportional to its volume

d. The mass of a gas dissolved per lit of a solvent is proportional to the pressure of the gas in equilibrium with the solution

Question 15: Hess’s law is used to determine

a. Heat of formation of substances which are otherwise difficult to calculate

b. Heat of transition

c. Heat of dissociation

d. All of these

Question 16: A certain mass of gas is expanded from (1L, 10 atm) to (4L, 5 atm) against a constant external pressure of 1 atm. If initial temperature of gas is 300K and the heat capacity of process is 50 J/^oC. Then the enthalpy change during the process is (1 L ~ 100 J)

a. ∆H = 15 kJ

b. ∆H = 15.7 kJ

c. ∆H = 14.4 kJ

d. ∆H = 14.7 kJ

Question 17: The enthalpies of elements under the following conditions are assumed to be

a. Zero at 298K and 1 atm

b. Unity at 298K and 1 atm

c. Zero at 273K and 1 atm

d. Unity at 273K and 1 atm

Question 18: If the total enthalpy of reactants and products is H_R and H_P respectively, then for exothermic reaction

a. H_R = H_P

b. H_R < H_P

c. H_R > H_P

d. H_P ≥ H_R

Question 19: The first law of thermodynamics is represented by the equation:

a. ∆E = Q - W

b. ∆E = Q + W

c. W = Q + ∆E

d. Q = W + ∆E

Question 20: Enthalpy of neutralisation of all strong acids and strong bases has the same value because

a. Neutralisation leads to the formation of a salt and water

b. Strong acid and bases are iconic substances

c. Acids always furnish H⁺ ions and bases always furnish OH^- ions

d. The net chemical change involves the combination of 1 mol of H⁺ ions and 1 mol OH^- ions to form water.

Thermodynamics (Syllabus for NEET and JEE):

Fundamentals of thermodynamics: System and surroundings, extensive and intensive properties, state functions, types of processes. Thermal equilibrium, Zeroth law of thermodynamics, concept of temperature. First  law  of  thermodynamics: internal  energy  and  enthalpy,  heat  capacity  and  specific  heat, measurement of U and H, Hess’s law of constant heat summation. Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, ionization, solution and dilution. Introduction of entropy as state function. Second law of thermodynamics: Gibbs energy change for spontaneous and non-spontaneous processes, reversible and irreversible processes, criteria for equilibrium and spontaneity. Carnot engine and its efficiency. Third law of thermodynamics: Brief introduction.

India Study Solution - Hints and Solutions Chemistry MCQ Test Series

Thermodynamics

Solutions of Chemistry Test Series (MCQ) – Set 2 (Q. No.11–20)

https://www.indiastudysolution.com

Answer 11: b. Answer 12: a. Answer 13: a. Answer 14: a. Answer 15: d.

Answer 16: b.

Hint:

∆H = ∆E + ∆(PV) and

∆E = q + W = (50 x 300 – 3 x 100) J [as T_f = 2 x 300 K = 600 K] = 14.7 kJ

∆H = 14700 + 10 x 100 = 15700 J = 15.7 kJ

Answer 17: a. Answer 18: c. Answer 19: b. Answer 20: d.

 THERMODYNAMICS - India Study Solution Chemistry Test Series Questions

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Thermodynamics - Free online Chemistry MCQ Test Series, Practice Questions with Solutions for JEE, NEET, Engineering and Medical Admission Tests

Chemistry Solved MCQ Test Series, Practice Questions

NEET, IIT JEE Main, AIIMS, NTSE

Welcome to your own site India Study Solution Below you will get carefully selected 10 MCQ practice questions in our each Test Series with hints & solutions (given at the end) from Chemistry Solutions chapter - Thermodynamics, Thermochemistry.
All these are typically important questions for NEET-UG, JEE Main & Advanced (IIT) AIIMS, JIPMER, COMEDK, MBBS Admission Tests, Engineering Entrance Exams, NEST and other such competitive exams.

Thermodynamics (Syllabus for NEET and JEE):

Fundamentals of thermodynamics: System and surroundings, extensive and intensive properties, state functions, types of processes. Thermal equilibrium, Zeroth law of thermodynamics, concept of temperature. First  law  of  thermodynamics: internal  energy  and  enthalpy,  heat  capacity  and  specific  heat, measurement of U and H, Hess’s law of constant heat summation. Enthalpies of bond dissociation, combustion, formation, atomization, sublimation, phase transition, ionization, solution and dilution. Introduction of entropy as state function. Second law of thermodynamics: Gibbs energy change for spontaneous and non-spontaneous processes, reversible and irreversible processes, criteria for equilibrium and spontaneity. Carnot engine and its efficiency. Third law of thermodynamics: Brief introduction.

Chemistry Practice Questions: Thermodynamics (Thermochemistry)MCQ Test Series – Set 1 (Q. No. 1-10)

Question 1: Which of the following statements is correct?

a. Only internal energy is a state function but not work.

b. Only work is a state function but not internal energy.

c. Both internal energy and work are state functions.

d. Neither internal energy nor work is a state function.

Question 2: The amount of water that can be dissociated by the amount of heat liberated when 49 g H₂SO₄ and 20 g NaOH are mixed and reacted in aqueous solution is:

a. 1.803

b. 3.58

c. 0.895

d. 17.9

Question 3: A sample of 2 kg of helium (assumed ideal) is taken through the process ABC and another sample of 2 kg of the same gas is taken through the process ADC. Then the temperature of the states A and B are (Given R = 8.3 joules/mol K):

  

a. T_A = 120.5K, T_B = 120.5K

b. T_A = 241 K, T_B = 241 K

c. T_A = 120.5 K, T_B = 241 K

d. T_A = 241 K, T_B = 482 K

Question 4: What is the work done against the atmosphere when 25 grams of water vaporises at 373 K against a constant external pressure of atm ? Assume that steam obeys perfect gas laws. Given that the molar enthalpy of vaporization is 9.72 kcal/mole, what is the change of internal energy in the above process?

a. 1294.0 cals, 11247 cals

b. 921.4 cals, 11074 cals

c. 1024.8 cals, 12470.6 cals

d. 1129.3 cals, 10207 cals

Question 5: Warming ammonium chloride with sodium hydroxide in a test tube is an example of:

a. Closed system

b. Isolated system

c. Open system

d. None of these

Question 6: Adiabatic process involves

a. Q = 0

b. ∆E = 0

c. ∆W = 0

d. ∆V = 0

Question 7: A gas expands from 10 litres to 20 litres against a constant external pressure of 10 atm. The pressure-volume work done by the system is

a. 100 L atm

b. -100 L atm

c. 10 L atm

d. -10 L atm

Question 8: In an isothermal expansion of a gaseous sample the correct relation is (consider w (work) with sign according to new IUPAC convention)

[The reversible and irreversible processes are carried out between same initial and final states]

a. w_rev  > w_irrev

b. w_irrev  > w_rev

c. q_rev< q_irrev

d. cannot be predicted

Question 9: A tightly closed thermoflask contains some ice cubes. This constitutes

a. closed system

b. open system

c. isolated system

d. Non-thermodynamic system

Question 10: The process CO₂ (g) + H₂O → 2H⁺ (aq) + CO₃^-2 (aq),

∆H = +2000J taking place in a closed vessel is accompanied with [given S⁰ of CO₂, H₂O, H⁺ (aq) & CO₃^-2(aq) = 213, 70, 0 & 57J/Mol/K]

a. DS_sys = -340 J/K

b. DS_sur ≈ -7KJ/K

c. DS_total = -333 J/K

d. DS_sys = -340 J/K

India Study Solution - Hints and Solutions Chemistry MCQ Test Series

Thermodynamics

Solutions of Chemistry Test Series (MCQ) – Set 1 (Q. No.1 –10)

https://www.indiastudysolution.com

Answer 1: a. Answer 2: a.

Answer 3: c. Hint:

T₂ = 4T­­₁

P_A V_A = nRT_A

5 x 10 = [(2 x 1000) ÷ 2] x 0.082 T_A

or, T_A = 120.5,

at constant volume, (P_A / T_A) = (P_B / T_B)

T_B = P_B.T_A / T_A = 241 K.

Answer 4: c. Hint:

Mole of H₂O = 1.39

Pv = nRT

1 x v = 1.39 x 0.082 x 373

v = 42.8.

w = Pext. dv = 1 x [42.8] atm x lit

= (– 42.8 x 101.325) J = [–(42.8 x 101.325) ÷ 4.2] cal

= 1024.8 cal

∆H = ∆E + (P∆v) = 12470.6 cal/s.

Answer 5: c. Answer 6: c. Answer 7: b. Answer 8: b. Answer 9: c. Answer 10: a.

 THERMODYNAMICS - India Study Solution Chemistry Test Series Questions

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45 lakh candidates stuck as JEE, NEET other major Entrance Tests deferred due to Nation-wide lockdown amid Corona Virus outbreak

As many as 45 lakh students preparing for major competitive examinations scheduled over the next three months are stranded as the nationwide lockdown in the wake of corona virus outbreak has upset the examination calendar by at least a month.

JEE Advanced, JEE Main, NEET, UGC-NET, CSIR UGC-NET, Indian Council of Agricultural Research (ICAR) scheduled in April, May and June 2020 will be affected by this lockdown.

Indian Government, NTA has notified that JEE and NEET Entrance Tests have been postponed to the last week of May keeping in mind the three week National lockdown due to Corona virus outbreak in India.

The National Eligibility cum Entrance Test (NEET) whose marks are used for admission in Medical Colleges across the country was scheduled to be held on 3rd May. As of now NEET is proposed to be held in the last week of May’20, exact dates will be announced later after assessing the situation due to corona virus pandemic.

Similarly the Engineering Entrance Test JEE Main has been postponed till last week of may as per the official statement issued yesterday 27^th March’20 in view of the current situation prevailing in the country due to Corona virus outbreak. The exam conducting agency NTA (National Testing Agency) has released a notification in which it has intimated to candidates that the examination dates will be announced letter after assessing the situation.

NEET is held annually for admission to undergraduate medical courses MBBS, BDS and Ayush programs through this examination. Admission to veterinary courses are also done on the basis of NEET score.

JEE main is held for admission to undergraduate engineering programs at NITs, IITs, other centrally funded technical institutions, cftri Institutions funded by participating State Governments. The exam is held twice a year and candidates are allowed to appear for both these examinations.

As of now, both NEET and JEE have been postponed till further dates are announced by NTA. These examinations were scheduled to be held in April and May 2020. NTA is yet to announce about other examinations.