S and P block Test 10

Total Questions:50 Total Time: 75 Min



Questions 1 of 50

Question:Composition of borax is

Answers Choices:





Questions 2 of 50

Question:Sodium gives blue colour with \(N{H_3}\) solution, this blue colour is due to

Answers Choices:

Ammoniated \(N{a^ \oplus }\)

Ammoniated \(N{a^\Theta }\)

Ammoniated \({e^ - }\)

\(N{a^ + }/N{a^ - }\)pair

Questions 3 of 50

Question:Aluminium reacts with caustic soda to form

Answers Choices:

Aluminium hydroxide

Aluminium oxide

Sodium meta-aluminate

Sodium tetra aluminate

Questions 4 of 50

Question:The metallic lustre exhibited by sodium is explained by

Answers Choices:

Diffusion of sodium ions

Oscillation of loose electrons

Excitation of free protons

Existence of body centred cubic lattice

Questions 5 of 50

Question:Squashes are stored by adding

Answers Choices:

Citric acid



Sodium metabisulphite

Questions 6 of 50

Question:The alum used for purifying water is

Answers Choices:

Ferric alum

Chrome alum

Potash alum

Ammonium alum

Questions 7 of 50

Question:Setting of plaster of paris is

Answers Choices:

Oxidation with atmospheric oxygen

Combination with atmospheric \(C{O_2}\)


Hydration to yield another hydrate

Questions 8 of 50

Question:Bleaching powder is obtained by the interaction of chlorine and

Answers Choices:

Conc. solution of \(Ca{(OH)_2}\)

Dilute solution of \(Ca{(OH)_2}\)

Dry calcium oxide

Dry slaked lime

Questions 9 of 50

Question:Which of the following salts is insoluble in water at room temperature but soluble in boiling water

Answers Choices:





Questions 10 of 50

Question:Which is quick lime

Answers Choices:




\(Ca{(OH)_2} + {H_2}O\)

Questions 11 of 50

Question:Magnesium does not decompose the

Answers Choices:


Hot water

Cold Water

Semi hot water

Questions 12 of 50

Question:In the lime (kiln), the reaction \(CaC{O_3}(s) \to C{O_2}(g)\) goes to completion because

Answers Choices:

Of high temperature

CaO is more stable than \(CaC{O_3}\)

\(C{O_2}\) escapes simultaneously

CaO is not dissociated

Questions 13 of 50

Question:Plaster of paris is used

Answers Choices:

In surgery and dentistry

As a white wash

As a constituent of tooth paste

For the preparation of RCC

Questions 14 of 50

Question:Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas

Answers Choices:

Aluminium chloride

Hydrate aluminium chloride

Anhydrous aluminium chloride

None of these

Questions 15 of 50

Question:The most abundant metal in the earth crust is

Answers Choices:





Questions 16 of 50

Question:Which one of the following is correct statement

Answers Choices:

The hydroxide of aluminium is more acidic than that of boron

The hydroxide of boron is basic, while that of aluminium is amphoteric

The hydroxide of boron is acidic, while that of aluminium is amphoteric

The hydroxide of boron and aluminium are amphoteric

Questions 17 of 50

Question:In the extraction of aluminium the electrolyte is

Answers Choices:

Fused cryolite with feldspar

Fused cryolite with fluorspar

Pure alumina in molten cryolite

Pure alumina with bauxite and molten cryolite

Questions 18 of 50

Question:The structure of diborane \(({B_2}{H_6})\) contains

Answers Choices:

Four 2c-2e bonds and two 3c-2e bonds

Two 2c-2e bonds and four 3c-2e bonds

Two 2c-2e bonds and two 3c-3e bonds

Four 2c-2e bonds and four 3c-2e bonds

Questions 19 of 50

Question:Metalloid among the following is

Answers Choices:





Questions 20 of 50

Question:Which gas is used in excess water

Answers Choices:




Water vapours

Questions 21 of 50

Question:Which of the following statement is correct with respect to the property of elements in the carbon family with an increase in atomic number, their

Answers Choices:

Atomic size decreases

Ionization energy increases

Metallic character decreases

Stability of +2 oxidation state increases

Questions 22 of 50

Question:Which of the following compounds has peroxide linkage

Answers Choices:





Questions 23 of 50

Question:Phosphine is prepared by the reaction of

Answers Choices:

\(P\) and \({H_2}S{O_4}\)

\(P\) and \(NaOH\)

\(P\) and \({H_2}S\)

\(P\) and \(HN{O_3}\)

Questions 24 of 50

Question:Which of the following oxide of nitrogen is the anhydride of \(HN{O_3}\)

Answers Choices:





Questions 25 of 50

Question:\(N{O_2}\) is a mixed oxide is proved by the first that with \(NaOH\), it forms

Answers Choices:

Nitrites salt

Nitrates salt

Mixture of nitrate and nitrite


Questions 26 of 50

Question:In \(N{H_4}N{O_2},\) the oxidation number of nitrogen will be

Answers Choices:



3 and + 3

+ 3 and + 5

Questions 27 of 50

Question:The strongest base is

Answers Choices:





Questions 28 of 50

Question:Which of the following oxides of nitrogen is the anhydride of nitrous acid

Answers Choices:





Questions 29 of 50

Question:Nitrogen is essential constituent of all

Answers Choices:



Proteins and fats

None of these

Questions 30 of 50

Question:Phosphine is produced by adding water to

Answers Choices:





Questions 31 of 50

Question:Calcium cyanamide on treatment with steam under pressure gives ammonia and

Answers Choices:

Calcium carbonate

Calcium hydroxide

Calcium oxide

Calcium bicarbonate

Questions 32 of 50

Question:Atoms in a \({P_4}\) molecule of white phosphorus are arranged regularly in space in which of the following way

Answers Choices:

At the corners of tetrahedron

At the corners of a cube

At the corners of a four membered ring

At the centre and corners of an equilateral triangle

Questions 33 of 50

Question:Sodium pyrophosphate is

Answers Choices:





Questions 34 of 50

Question:When \(HN{O_3}\) is dropped into the palm and washed with water, it turns into yellow. It shows the presence of

Answers Choices:





Questions 35 of 50

Question:In \(N{H_3}\) and \(P{H_3}\), the common is

Answers Choices:



Basic nature

None of these

Questions 36 of 50

Question:In group V-A of the periodic table nitrogen forms only a trihalide but other elements form pentahalides also. The reason is

Answers Choices:

Nitrogen has less affinity towards halogens

Nitrogen halides are covalent

Nitrogen undergoes \({d^2}s{p^3}\) hybridization

Nitrogen does not have d-orbitals

Questions 37 of 50

Question:Which of the following halides is most acidic

Answers Choices:





Questions 38 of 50

Question:The number of unpaired electrons in the p-subshell of oxygen atom is

Answers Choices:





Questions 39 of 50

Question:Which of the following statement is true about ozone layer

Answers Choices:

It is harmful because ozone is dangerous to living organism

It is beneficial because oxidation reaction can proceed faster in the presence of ozone

It is beneficial because ozone cuts out the ultraviolet radiation of the sun

It is harmful because ozone cuts out the important radiation of the sun which are vital for photosynthesis

Questions 40 of 50

Question:A salt of sulphurous acid is called

Answers Choices:





Questions 41 of 50

Question:Hypo is used in photography for

Answers Choices:

Developing a picture

Picture printing

The colour of picture

The fixation of the picture

Questions 42 of 50

Question:Among \(K{O_2},\) \(NO_2^ - ,\) \(Ba{O_2}\) and \(NO_2^ + \) unpaired electron is present in

Answers Choices:

\(NO_2^ + \) and \(Ba{O_2}\)

\(K{O_2}\) and \(Ba{O_2}\)

\(K{O_2}\) only

\(Ba{O_2}\) only

Questions 43 of 50

Question:In the manufacture of sulphuric acid by contact process, Tyndall box is used to

Answers Choices:

Filter dust particles

Remove impurities

Convert \(S{O_2}\) to \(S{O_3}\)

Test the presence of dust particles

Questions 44 of 50

Question:Sulphur in +3 oxidation state is present in

Answers Choices:

Sulphurous acid

Pyrosulphuric acid

Dithionous acid

Thiosulphuric acid

Questions 45 of 50

Question:\(B{r_2}\) gas turns starch iodide paper

Answers Choices:





Questions 46 of 50

Question:Strongest reducing agent is

Answers Choices:

\({F^ - }\)

\(C{l^ - }\)

\(B{r^ - }\)

\({I^ - }\)

Questions 47 of 50

Question:Mark the element which shows only one oxidation state

Answers Choices:





Questions 48 of 50

Question:When chlorine water is exposed to sunlight, \({O_2}\) is liberated. Hence

Answers Choices:

Hydrogen has little affinity to \({O_2}\)

Hydrogen has more affinity to \({O_2}\)

Hydrogen has more affinity to\(C{l_2}\)

It is a reducing agent

Questions 49 of 50

Question:\(HCl\) is a gas, but \(HF\) is a low boiling liquid. This is because

Answers Choices:

\(H - F\) bond is strong

\(H - F\) bond is weak

The molecules aggregate because of hydrogen bonding in \(HF\)

\(HF\) is a weak acid

Questions 50 of 50

Question:The formula of some fluorides are given below. Which of them will combine further with fluorine

Answers Choices: