p-Block Elements · Chemistry · AP EAPCET

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MCQ (Single Correct Answer)

1

Which of the following are correct?

i. Basic structural unit of silicates is $-R_2 \mathrm{SiO}-$

ii. Silicones are biocompatible

iii. Producer gas contains CO and $\mathrm{N}_2$

The correct option is

AP EAPCET 2024 - 20th May Evening Shift
2
' $X$ ' on hydrolysis gives two products. One of them is solid. What is ' $X$ '?
AP EAPCET 2024 - 20th May Morning Shift
3

Which of the following reactions give phosphine?

i. Reaction of calcium phosphide with water

ii. Heating white phosphorous with concentrated NaOH solution in inert atmosphere

iii. Heating red phosphorous with alkali

AP EAPCET 2024 - 20th May Morning Shift
4

Observe the following stoichiometric equation

$$ \mathrm{P}_4+3 \mathrm{OH}^{-}+3 \mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{PH}_3+3 x^{-} $$

What is the conjugate acid of $x^{-}$?

AP EAPCET 2024 - 19th May Evening Shift
5

Identify the correct statements

i. Oxidation of $\mathrm{NaBH}_4$ with $\mathrm{I}_2$ gives $\mathrm{B}_2 \mathrm{H}_6$

ii. $\mathrm{B}_2 \mathrm{H}_6$ burns in oxygen and releases an enormous amount of energy

iii. $\mathrm{B}_2 \mathrm{H}_6$ on hydrolysis gives a tribasic acid

AP EAPCET 2024 - 19th May Evening Shift
6
The disproportionation products of ortho phosphorus acid are
AP EAPCET 2024 - 19th May Evening Shift
7
Aluminium carbide on reaction with $\mathrm{D}_2 \mathrm{O}$ gives $\mathrm{Al}(O D)_3$ and ' $X^{\prime}$. What is ' $X^{\prime}$ '?
AP EAPCET 2024 - 18th May Morning Shift
8
When chlorine reacts with hot and conc. NaOH . The products formed are
AP EAPCET 2024 - 18th May Morning Shift
9

Identify the $$P$$ and $$Q$$ of the following reaction

$$P+Q \longrightarrow\left[B(O H)_4\right]^{-}+\mathrm{H}_3 \mathrm{O}^{+}$$

AP EAPCET 2022 - 5th July Morning Shift
10

Among $$\mathrm{P}_4, \mathrm{~S}_8$$ and $$\mathrm{N}_2$$ the elements which undergo disproportionation when heated with NaOH solution.

AP EAPCET 2022 - 4th July Evening Shift
11

Identify the correct statements about the anomalous behaviour of boron.

I. Boron trihalides can form dimeric structures.

II. Boron shows +1 as stable oxidation state.

III. Maximum covalency of boron is four.

IV. Boron does not form $$\mathrm{BF}_6^{6-}$$ ion.

AP EAPCET 2022 - 4th July Evening Shift
12

Which of the following is formed when $$\mathrm{SO}_3$$ is absorbed by concentrated $$\mathrm{H}_2 \mathrm{SO}_4$$ ?

AP EAPCET 2022 - 4th July Evening Shift
13

Identify the correct statements about boron.

I. It has high melting point.

II. It has high density.

III. It has high electrical conductivity.

IV. B-10 isotope of it has high ability to absorb neutrons.

AP EAPCET 2022 - 4th July Morning Shift
14

Assertion (A) HCl gas is dried by passing through concentrated H$$_2$$SO$$_4$$.

Reason (R) HCl gas reacts with NH$$_3$$ that gives white fumes.

AP EAPCET 2022 - 4th July Morning Shift
15

What would be the product of following reaction?

$$\mathrm{SiCl}_4 \stackrel{\text { Excess of } \mathrm{H}_2 \mathrm{O}}{\longrightarrow} \text { ? (Major product) }$$

AP EAPCET 2021 - 20th August Morning Shift
16

Identify (P) and (Q) in the following reaction.

AP EAPCET 2021 - 19th August Morning Shift Chemistry - p-Block Elements Question 17 English

AP EAPCET 2021 - 19th August Morning Shift
17

Match the following compounds with their corresponding physical properties.

Column I Column II
A. $$\mathrm{IBr}$$ 1. Orange solid
B. $$\mathrm{CIF}_3$$ 2. Yellow-green liquid
C. $$\mathrm{BrF}_3$$ 3. Black solid
D. $$\mathrm{ICl}_3$$ 4. Colourless gas

AP EAPCET 2021 - 19th August Morning Shift
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