Book Store

Download books and chapters from book store.
Currently only available for.
CBSE

Subject

Chemistry

NEET Chemistry : The p-Block Elements

Multiple Choice Questions

141.

A greenish yellow gas reacts with alkali metal hydroxide to form a halate which can be used in fire works and safety matches. The gas and halate respectively are :

B₂ , KBrO₃
Cl₂ , KClO₃
I₂ , NaIO₃
Cl₂ , NaClO₃

142.

Liquid flow from a higher to a lower level.Which of the following liquids can climb up the walls of the glass vessel in which it is placed?

Mercury
Liquid N₂
Liquid He (II)
Water

143.

The basic strengths of conjugate bases of oxyacids ofCl will be in the order.

${Cl}_{4}^{-} < {ClO}_{3}^{-} < {ClO}_{2}^{-} < {ClO}^{-}$
${ClO}_{3}^{-} < {ClO}_{2}^{-} < {ClO}^{-} < {ClO}_{4}^{-}$
${ClO}^{-} < {Cl}_{4}^{-} < {ClO}_{3}^{-} < {ClO}_{2}^{-}$
${Cl}_{4} < {ClO}_{2}^{-} < {ClO}_{3}^{-} < {ClO}^{-}$

144.

Which one of the following phosphorous compound is used during electrode position of metal on rubber and for making pesticides?

Phosphorus pentachloride (PCl₅)
Phosphorus (Ill) oxide (P₄O₈)
Phosphorus M oxide (P₄O₁₀)
Phosphorus trichloride (PCl₃)

145.

In trimeta-phosphate ion, the number of 0 atom P-O-P bonds and unit negative charges are respectively:

6,6,3
3,6,3
9,3,3
9,6,3

146.

Conc. H₂SO₄ displaces hydrogen chloride from chlorides because:

it is stronger acid
sulphates are less soluble than chlorides
sulphates are more soluble than chlorides
HCl is a gas while H₂SO₄ is a liquid

147.

Reduction potential of some ions are given below:

Arrange them in decreasing order of oxidising power.

Ions Reduction : Cl $O_{4}^{-}$ I $O_{4}^{-}$ Br $O_{4}^{-}$

Potential E^v = 1.19 V E^v = 1.741

Potential E^v / V

Cl $O_{4}^{-}$ > I $O_{4}^{-}$ < Br $O_{4}^{-}$
I $O_{4}^{-}$ > Br $O_{4}^{-}$ < Cl $O_{4}^{-}$
Br $O_{4}^{-}$ < I $O_{4}^{-}$ < Cl $O_{4}^{-}$
Br $O_{4}^{-}$ < Cl $O_{4}^{-}$ < I $O_{4}^{-}$

148.

Which of the following forms molecular solid?

SO₂
SiO₂
SiC
Diamond

149.

When plants and animals decay, the organic nitrogen is converted into inorganic nitrogen. The inorganic nitrogen is in the form of :

ammonia
elements of nitrogen
nitrates
nitrides

150.

Which of the following is the laboratory method for synthesis of nitric oxide?

Reaction of zinc with cold and dilute HNO₃
Reaction of zinc with concentrated HNO₃
Reaction of copper with cold and dilute HNO₃
Heating NH₄NO₃

Do a good deed today
Refer a friend to Zigya