Chemistry Test 95

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Chemistry Test 95

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Weekly Quiz Competition

Question 1
4 / -1

If the amount of radioactive substance is increased three times and simultaneously temperature also increases thrice, the number of atoms disintegrating per unit time would be -

A
1/3 rd of original atoms

B
constant

C
Triple

D
9 time

Solution

-dN/ dt = λN
Question 2
4 / -1

5 millimoles of SO₂Cl₂ is completely dissolved in 2 Liters of solution causing the reaction,

SO₂Cl_2(aq.) + 2H₂O_(ℓ) —→ H₂SO₄ _(aq.) + 2HCl_(aq.) pOH of the solution is :

A
2

B
10

C
12

D
11
Question 3
4 / -1

What will be IUPAC name of compound when allyl and neopentyl joined together :

A
4,4-dimethyl pent-1-ene

B
5,5-dimethyl hex-1-ene

C
6-methyl hept-1-ene

D
5-methyl hex-1-ene
Question 4
4 / -1

A solution contains one moles each of HA & HB (both are weak acids) in one litre solution. Now one mole of NaOH is added to this solution so that both the acids are partially neutralised. Heat of neutralisation of HA & HB are –11.8 and –12.4 kcal per mole respectively and heat produced during partial neutralisation of HA & HB is –12.25 kcal.

Mole ratio of neutralisation of HA & HB is -

A
1 : 4

B
1 : 2

C
1 : 3

D
1 : 5

Solution

a × 11.8 + b × 12.4 = 12.25

a + b = 1

a × 11.8 + (1 – a) × 12.4 = 12.25

a = 1/4 , b = 3 / 4

mole ratio = 1/3
Question 5
4 / -1

A solution contains one moles each of HA & HB (both are weak acids) in one litre solution. Now one mole of NaOH is added to this solution so that both the acids are partially neutralised. Heat of neutralisation of HA & HB are –11.8 and –12.4 kcal per mole respectively and heat produced during partial neutralisation of HA & HB is –12.25 kcal.

pH of solution containing mixture of 1 mol of HA & 1 mole of HB in 1 litre solution is K_a(HA) = 1 × 10^–5, K_a(HB) = 9×10^–5

A
2

B
3

C
4

D
5

Question 6

4 / -1

Match the effect of addition of 1(M) NaOH to 100 ml of 1(M) weak acid (HA) in (List-I) with pH in ( List-II)

List-I		List-II
(P)	25 ml of NaOH	(1)	Buffer solution
(Q)	50 ml of NaOH	(2)	pK_a + log3
(R)	75 ml of NaOH	(3)	pK_a – log3
(S)	100 ml of NaOH	(4)	1/2 [pK_W + pK_a – log2]

The CORRECT option is

P → 1,2,Q → 3,4,R → 2,S → 2

P → 1,3,Q → 1,R → 1,2,S → 4

P → 2,4,Q → 1,2,R → 3,4,S → 1

P → 4,Q → 1,4,R → 3,S → 4

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Re-Attempt Weekly Quiz Competition

Chemistry Test 95

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Chemistry Test 95

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SHARING IS CARING

Question 1

1/3 rd of original atoms

constant

Triple

9 time

Solution

Question 2

2

10

12

11

Question 3

4,4-dimethyl pent-1-ene

5,5-dimethyl hex-1-ene

6-methyl hept-1-ene

5-methyl hex-1-ene

Question 4

1 : 4

1 : 2

1 : 3

1 : 5

Solution

Question 5

2

3

4

5

Question 6

P → 1,2,Q → 3,4,R → 2,S → 2

P → 1,3,Q → 1,R → 1,2,S → 4

P → 2,4,Q → 1,2,R → 3,4,S → 1

P → 4,Q → 1,4,R → 3,S → 4

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