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11th Standard Chemistry Alkali and Alkaline Earth Metals English Medium Free Online Test One Mark Questions 2020 - 2021

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

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Questions:

Multiple Choice Question

17 x 1 = 17

Lime water turning milky is due to the formation of ______

(a)

calcium carbonate

(b)

calcium hydroxide

(c)

calcium hydroxide

(d)

calcium chloride

Ca(OH)₂ is _______

(a)

gypsum

(b)

milk of lime

(c)

slaked lime

(d)

lime water

Compounds of alkaline earth metals are less soluble in water than the corresponding alkali metals salts due to ________

(a)

their increased covalent character

(b)

high lattice energy

(c)

their high ionization energy

(d)

none of the above

What is the trend of formation of ionic compound in alkaline earth metals?

(a)

Increases down the group

(b)

Decreases down the group

(c)

Decreases across the period

(d)

Remains same in the periodic table

_________ is the cofactor of all enzymes that utilize ATP in phosphate transfer and energy release.

(a)

(b)

(c)

(d)

_______ is unstable in air and is kept in CO₂ atmosphere to avoid decomposition.

(a)

BeCO₃

(b)

MgCO₃

(c)

CaCO₃

(d)

BaCO₃

Match the list I with List II and select the correct answer using. the code given below the lists.

List I		List II
A	Ba	1	Crimson red
B	Ca	2	Lilac
C	Sr	3	Apple green
D	K	4	Brick red

(a)

A	B	C	D
1	3	2	4

(b)

A	B	C	D
4	3	1	2

(c)

A	B	C	D
3	4	1	2

(d)

A	B	C	D
2	1	4	3

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

The metallic lustre exhibited by sodium is due to ________

(a)

Excitation of free protons

(b)

Existence of body centered cubic lattice

(c)

Diffusion of Na⁺ ions.

(d)

Vibration of loose electrons

10.

Which among the following is the strongest reducing agent?

(a)

(b)

(c)

(d)

11.

Spodumene is the silicate mineral of _____

(a)

lithium

(b)

sodium

(c)

cesium

(d)

francium

12.

Match the flame colours of the alkali and alkaline earth metal salts in the bunsen burner

(P) Sodium	(1) Brick red
(q) Calcium	(2) Yellow
(r) Barium	(3) Violet
(s) Strontium	(4) Apple green
(t) Cesium	(5) Crimsonred
(u) Potassium	(6) Blue

(a)

p - 2, q - 1, r - 4, s - 5, t - 6, u - 3

(b)

p - 1, q - 2, r - 4, s - 5, t - 6, u - 3

(c)

p - 4, q - 1, r - 2, s - 3, t - 5, u - 6

(d)

p - 6, q - 1, r - 2, s - 3, t - 5, u - 4

13.

The product obtained as a result of a reaction of nitrogen with CaC₂ is ___________

(a)

Ca(CN)₃

(b)

CaN₂

(c)

CaCN₂

(d)

Ca₃N₂

14.

In case of alkali metal halides, the ionic character increases in the order ____________

(a)

MF < MCI < MBr < MI

(b)

MI < MBr < MCI < MF

(c)

MI < MBr

(d)

none of these

15.

Find the wrong statement

(a)

sodium metal is used in organic qualitative analysis

(b)

sodium carbonate is soluble in water and it is used in inorganic qualitative analysis

(c)

potassium carbonate can be prepared by solvay process

(d)

potassium bicarbonate is acidic salt

16.

sodium is stored in _____________

(a)

alcohol

(b)

water

(c)

kerosene

(d)

none of these

17.

For alkali metals, which one of the following trends is incorrect ?

(a)

Hydration energy: Li > Na > K > Rb

(b)

Ionisation energy: Li > Na > K > Rb

(c)

Density: Li < Na < K < Rb

(d)

Atomic size: Li < Na < K < Rb

Assertion and reason

3 x 2 = 6

18.

Assertion : Alkaline earth metals are harder than alkali metals
Reason : Atomic radii of alkaline earth metals are smaller than corresponding alkali metals "in the same periods of periodic table
Codes:
a) both assertion and reason are true and reason is the correct explanation of assertion
b) both assertion and reason are true but reason is not the correct explanation of assertion
c) assertion is true but reason is false
d) both assertion and reason are false

(a)

Both assertion and reason are true and reason is the correct explanation for assertion.

(b)

Both assertion and reason are true but reason is not the correct explanation for assertion

(c)

Assertion is true but reason is false

(d)

Both assertion and reason are false

19.

Assertion : Lithium is in diagonal relationship with magnesium
Reason : Li⁺ has same size as Mg²
Codes:
(a) Both assertion and reason are true and reason is the correct explanation for assertion
(b) Both assertion and reason are true but reason is not the correct explanation for assertion
(c) Assertion is true but reason are false
(d) Both assertion and reason are false.

(a)

Both assertion and reason are true and reason is the correct explanation for assertion.

(b)

Both assertion and reason are true but reason is not the correct explanation for assertion

(c)

Assertion is true but reason are false

(d)

Both assertion and reason are false.

20.

Assertion : BeSO₄ is soluble in water while BaSO₄ is not
Reason : Hydration energy decreases down the group from Be to Ba and lattice energy remains almost constant.
(a) both assertion and reason are true and reason is the correct explanation of assertion
(b) both assertion and reason are true but reason is not the correct explanation of assertion
(c) both assertion and reason are false.
(d) Both assertion and reason are false

(a)

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

(b)

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

(c)

assertion is true but reason is false

(d)

both assertion and reason are false.