Chemistry

1. mark review The tribasic acid is:

H₃PO₃

H₃PO₄

H₃PO₂

HPO₃

Question 1 of 15

2. mark review Nitrolium is:

CaCN₂+C

Ca(NO₃)₂

Ca(CN)₂

CaCN₂

Question 2 of 15

3. mark review The incorrect statement among the following is:

S₈ is the only allotropic form of sulpur.

O₃ is an allotropic form of oxygen

Red phosphorus is more stable in air than white phosphorus

C₆₀ is an allotropic form of carbon

Question 3 of 15

4. mark review Ozone in stratosphere is depleted by:

CF₂Cl₂

C₇F₁₆

C₆F₆

C₆H₆Cl₆

Question 4 of 15

5. mark review Choose the correct statement –

Ignition temperature of red phosphorus is low

Phosphorus does not form hydrides

White or yellow phosphorus is stored under water

Black phosphorus is non crystalline

Question 5 of 15

6. mark review In the nitrogen family the H – M – H bond angle in the hydrides MH₃ gradually becomes closer to 90° on going from N to Sb. This shows that gradually –

The basic strength of hydrides increases

The bond pairs of electrons becomes nearer

Almost pure p-orbitals are used for M – H bonding

The bond energies of M – H bond increases

Question 6 of 15

7. mark review The element which is the most abundant in the earth crust is

Question 7 of 15

8. mark review Which of the following oxides is most acidic?

N₂O₅

V₂O₅

Ag₂O

Question 8 of 15

9. mark review The ONO angle is maximum in:

NO⁺₂

NO⁻₂

NO⁻₃

NO₂

Question 9 of 15

10. mark review H₂S gas is not evolved when SO₃²⁻ ion reacts with following reagents.

Zn + dil. H₂SO₄

None of these

Al + Conc. NaOH

Al + dil. HCl

Question 10 of 15

11. mark review Iodide of Millon’s base is:

K₂HgI₄

NH₂HgO.HgI

HIO₃

Hg(NH₂)I

Question 11 of 15

12. mark review The ion or group detected by K₂[HgI₄] is:

CI⁻

NH₄⁺

NH₂⁻

Question 12 of 15

13. mark review An element (X) forms compounds of the formula XCI₃, X₂O₅ and Ca₃X₂, but does not form XCl₅. which of the following is the element

Question 13 of 15

14. mark review The statement true for N₃⁻ is:

It is called pseudo halogen

The formal oxidation state of nitrogen in this anion is – 1

It is isoelectronic with NO₂

It has non-linear structure

Question 14 of 15

15. mark review The paramagnetic species is:

SiO₂

TiO₂

KO₂

BaO₂

Question 15 of 15

Test Name	S-Block Elements Test
Subject	Chemistry
Test Type	MCQs
Total Question	15
Total Marks	30
Total Time	15 Mints
Test Help For	Chemistry Subject Test Preparation. All Jobs and recruitment Test prep. All admission test prep. MCAT and Engineering Test. Interviews preparation.

Test By Subject	Chemistry
Test By Topics	Chemistry Subject

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S-Block Elements Test Online MCQs

S-Block Elements Test Online MCQs

Chemistry

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