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11th Standard Chemistry English Medium Free Online Test One Mark Questions with Answer Key 2020 - Part Four

Published on: 10/11/2020

Download Tamil Nadu 11th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Chemistry

chapter: - Model Question paper

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Questions:

Multiple Choice Question

25 x 1 = 25

Which of the following is an example for polyhalo compounds?

(a)

Vinyl iodide

(b)

Chlorobenzene

(c)

Allyl chloride

(d)

Chloroform

Which one of the following test is used to detect phosphorous in an organic compound?

(a)

Silver nitrate test

(b)

Copper oxide test

(c)

Ammonium molybdate test

(d)

Lassaigne's test

For the reaction N₂O₄(g) ⇌ 2NO(g) K_c = 0.21 at 373 K. The concentrations of N₂O₄ and NO₂ are found to be 0.125 mol dm^-3 and 0.5 mol dm^-3 respectively at a given temperature. Predict the direction of the reaction.

(a)

At equilibrium

(b)

reverse direction

(c)

forward direction

(d)

Both reverse and forward direction

BOD values less than 5 ppm indicates a water sample to be _________

(a)

Poor in dissolved oxygen

(b)

rich in dissolved oxygen

(c)

Highly polluted

(d)

Not suitable for aquatic life

The electrometric effect is ___________

(a)

Permanent effect

(b)

Temporary effect

(c)

p-electrons transfer in the effect

(d)

Both (b) and (c)

Vapour phase diagram for a solution is below if dotted line represents deviation?

Correct observation for this solution

(a)

\(\triangle\)Hmix : +ve

(b)

\(\triangle\)Smix : +ve

(c)

\(\triangle\)Vmix : +ve

(d)

All of these

Among the following mixtures, dipole-dipole as the major inferaction, is present in ________

(a)

Benzene and CCl₄

(b)

Benzene and C₂H₅OH

(c)

CH₃COCH₃ and CH₃CN

(d)

KCI and water

The blocking of capillaires due to sudden release of bubbles of N₂ gas in blood is known as ______

(a)

bends

(b)

blends

(c)

mends

(d)

all of these

The instrument used for measuring the atmospheric pressure is ___________.

(a)

lactometer

(b)

barometer

(c)

electrometer

(d)

ammeter

10.

Consider the following statements.
(i) Alkali metals exhibit high chemical reactivity due to their low ionization energy.
(ii) Lithium is a very soft metal and even it can be cut with a knife.
(iii) Francium is a radioactive element in group 1 elements
Which of the above statements is/are not correct?

(a)

(i) only

(b)

(ii) only

(c)

(i) and (iii)

(d)

(i), (ii) and (iii)

11.

Which set of the metals do not have any effect on water?

(a)

Ag, Au, Pt

(b)

Na, Mg, Al

(c)

Fe, Ca, Zn

(d)

Fe, Pb, Na

12.

Electronegativity of the following elements increases in the order

(a)

C, N, Si, P

(b)

N, Si, C, P

(c)

Si, P, C, N

(d)

P,Si, N, C

13.

Which of the following expressions represents the electron probability function?

(a)

\(4\pi r dr{ \Psi }^{ 2 }\)

(b)

\(4\pi r^2 dr{ \Psi }\)

(c)

\(4\pi r^2 dr{ \Psi }^{ 2 }\)

(d)

\(4\pi r dr{ \Psi }\)

14.

If system moves from ordered state to disordered state, its entropy ___________

(a)

Decreases

(b)

Increases

(c)

Become zero

(d)

Increases then decreases

15.

Maximum deviations from ideal gas is expected from ___________

(a)

H₂(g)

(b)

N₂(g)

(c)

CH₄(g)

(d)

NH₃(g)

16.

The most electronegative element of the periodic table is _______

(a)

Iodine

(b)

Fluorine

(c)

Chlorine

(d)

Oxygen

17.

An ideal gas, obeying kinetic theory of gases cannot be liquefied, because _____________

(a)

its critical temperature is above 0°C.

(b)

force acting between its molecules are negligible.

(c)

its molecules are relatively small in size.

(d)

it solidifies before becoming a liquid

18.

Find out the correct statement with respect to alkali metals.

(a)

They react with oxygen to give mainly the oxide MO₂

(b)

They react with halogen to give halides MX

(c)

Their nitrates decompose on heating to give NO₂ and O₂

(d)

Their carbonates decompose on heating to give CO² and MO

19.

The rice is cooked earlier in pressure cooker because

(a)

boiling point increases with increasing pressure

(b)

boiling point decreases with increasing pressure

(c)

Internal energy is not lost while cooking in pressure cooker

(d)

Extra pressure of pressure cooker softens the rice

20.

___________ is considered as the potential alternative fuel of the future.

(a)

hydrogen

(b)

gasoline

(c)

biodiesel

(d)

propane

21.

In which process, fused sodium hydroxide is electrolysed for extraction of sodium ?

(a)

Castner's process

(b)

Cyanide process

(c)

Down process

(d)

All of these

22.

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidising behaviour ?

(a)

Cu + 2H₂SO₄ \(\longrightarrow \) CuSO₄ +SO₂ + 2H₂O

(b)

C + 2H₂ + SO₄ \(\longrightarrow \) CO₂ + 2SO₂ + 2H₂O

(c)

BaCl₂ + H₂SO₄ \(\longrightarrow \) BaSO₄ + 2HCl

(d)

None of the above

23.

Which of the following pairs of d-orbitals will have electron density along the axes ?

(a)

d_z2, d_xz

(b)

d_xz, d_yZ

(c)

d_z2, d_x²-y²

(d)

d_xy ,d_x^2-y²

24.

If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be ______________

(a)

1.2 g

(b)

2.4 g

(c)

3.6 g

(d)

\(\sqrt{4.8}\)g

25.

Which of the following elements will have the highest electro negativity ____________

(a)

Chlorine