p-Block Element...

Which is incorrectly matched ?

H₃PO₂  (X) + PH₃ ; is

Which of the following species is not a pseudohalide ?

An orange solid (X) on heating , gives a colourless gas (Y) and a only green residue (Z). Gas (Y) treatment with Mg, produces a white solid substance...............

Conc. HNO₃ is yellow coloured liquid due to

A gas at low temperature does not react with the most of compounds. It is almost inert and is used to create intent atmosphere in bulbs. The combustion of this gas is exceptionally an endothermic reaction Based on the given information, we can conclude that the gas is.

when chlorine gas is passed through an aqueous solution of a potassium halide in the presence of chloroform a violet colouration is obtained. On passing more of chlorine water, the violet colour is disappeared and solution becomes colourless. This test confirms the presence of ........ in aqueous solution.

H₃OPO₂  A  B  C

Compound (C) is

An explosive compound (A) reacts with water to produce NH₄OH and HOCl. Then, the compound (A), is

An inorganic salt (A) is decomposed at about 523 K to give products (B) and (C). Compounds (C) is a liquid at room temperature and is neutral to limus paper while oxide (B) on burning with white phosphorous given a dehydrating agent (D). Compounds (A), (B), (C) and (D) will be identified as N₂O.

An inorganic compound (A) made of two most occurring elements into the earth crust, having polymeric tetra-hedral net word structure. With carbon. compound (A) produces a poisonous gas (B) which is the most stable diatomic molecule. Compounds (A) and (B) will be

A sulphate of a metal (A) on heating evolves two gases (B) and (C) and an oxide (D). Gas (B) turns K₂Cr₂O₇ paper green while gas (C) forms a trimer in which there is non S-S bond. Compounds (D) with HCl, forms a Lewis base (E) which exists as a dimer. Compounds (A), (B) (C) , (D) and (E) are respectively

A tetra atomic molecule (A) on reaction with nitrogen (I) oxide, produces two substances (B) and (C) ,(B) is a dehyderating agent in its monometric form while substance (C) is a diatomic gas which shows almost intert behavior. The substances (A) and (B) and (C) respectively will be

First compound of intert gases was prepared by scientist Neil Barthleta in 1962. This compound is

Carbon give has X% of CO₂ and is used as an antidote for poisoning of Y. Then, X and Y are

The correct order of acidic strength of oxide of nitrogen is

Nitrogen dioxide is dissolved in water to produce

Consider two reactions

I. Zn + conc. HNO₃ (hot)  Zn(NO₃)₂ + X + H₂O II. Zn + dil. HNO₃ (cold) Zn(NO₃)₂ + Y + H₂O

Compounds X and Y are respectively

H₃BO₃  X  Y  B₂O₃

it T₁ < T₂ ten X and Y respectively are

Boron forms BX₃ type of halides. The correct increasing order of Lewis - acid strength of these halides is

Which one of the following compounds on strong heating evolves ammonia gas ?

The compound (SiH₃)₃N is

The correct order of acid strength of oxyacids of chlorine is

In a molecule of phosphorus (V) oxide, there are

The structures of O₃ and N₃^_ are

When conc. H₂SO₄ was treated with K₄[Fe(CN)_6], CO gas was evolved. By mistake, somebody used dilute H₂SO₄ instead of conc. H₂SO₄ then the gas evolved was

Compound (A) in pure form does not give ppt. with AgNO₃ solution. A mixture containing 70% of (A) and 30% of ether is used as an anaesthetic. Compound (X) and (Y) are oxides while (Z) is a pungen smelling gas. (X) is a neutral oxide which turns cobalt chloride paper pink. Compound (Y) turns liime water milky and produces an acidic solution with water. Compounds (A), (X), (Y) and (Z) respectively will be

An inorganic white crystalline compound (A) has a rock salt structure (A) on reaction with conc. H₂SO₄ and MnO₂, evolves a pungent smelling, greenish-yellow gas (B). Compound (A) gives white ppt. of (C) with AgNO₃ solution. Compounds (A), (B) and (C) will be respectively

Compound (A) is

When oxalic acid reacts with conc. H₂SO₄, two gases produced are of neutral and acidic in nature respectively. Potassium hydroxide absorbs one of the two gases. The product formed during this absorption and the gas which gets absorbed are respectively