#### 11th Standard Chemistry English Medium Free Online Test Book Back 1 Mark Questions with Answer Key - Part Two

11th Standard

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Chemistry

Time : 00:10:00 Hrs
Total Marks : 10

10 x 1 = 10
1. Assertion: Two mole of glucose contains 12.044 x 1023 molecules of glucose
Reason: Total number of entities present in one mole of any substance is equal to 6.02 x 1022

(a)

both assertion and reason are true and the reason is the correct explanation of assertion

(b)

both assertion and reason are true but the reason is not the correct explanation of assertion

(c)

an assertion is true but reason is false

(d)

both assertion and reason are false

2. Splitting of spectral lines in an electric field is called

(a)

Zeeman effect

(b)

Shielding effect

(c)

Compton effect

(d)

Stark effect

3. The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called

(a)

p-block elements

(b)

d-block elements

(c)

s-block elements

(d)

f-block elements

4. Which one of the following statements is incorrect with regard to ortho and para dihydrogen ?

(a)

They are nuclear spin isomers

(b)

Ortho isomer has zero nuclear spin whereas the para isomer has one nuclear spin

(c)

The para isomer is favoured at low temperatures

(d)

The thermal conductivity of the para isomer is 50% greater than that of the ortho isomer

5. Which of the following compounds will not evolve H2 gas on reaction with alkali metals?

(a)

ethanoic acid

(b)

ethanol

(c)

phenol

(d)

none of these

6. Which of the following is the correct expression for the equation of state of van der Waals gas?

(a)

$\left( P+\frac { a }{ { n }^{ 2 }{ V }^{ 2 } } \right) (V-nb)=nRT$

(b)

$\left( P+\frac { na }{ { n }^{ 2 }{ V }^{ 2 } } \right) (V-nb)=nRT$

(c)

$\left( P+\frac { { an }^{ 2 } }{ { V }^{ 2 } } \right) (V-nb)=nRT$

(d)

$\left( \frac { P+{ n }^{ 2 }{ a }^{ 2 } }{ { V }^{ 2 } } \right) (V-ab)=nRT$

7. In an adiabatic process, which of the following is true?

(a)

q = w

(b)

q = 0

(c)

ΔE = q

(d)

PΔV= 0

8. The equilibrium constant for a reaction at room temperature is K1 and that at 700 K is K2. If K1 > K2, then

(a)

The forward reaction is exothermic

(b)

The forward reaction is endothermic

(c)

The reaction does not attain equilibrium

(d)

The reverse reaction is exothermic

9. Stomach acid, a dilute solution of HCl can be neutralised by reaction with Aluminium hydroxide
Al (OH)3 + 3HCl (aq) → AlCl3 + 3 H2O
How many millilitres of 0.1 M Al(OH)3 solution are needed to neutralise 21 mL of 0.1 M HCl?

(a)

14 mL

(b)

7 mL

(c)

21 mL

(d)

none of these

10. Which of the following is electron deficient?

(a)

PH3

(b)

(CH3)2

(c)

BH3

(d)

NH3