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Inorganic Chemistry (GATE)

Periodic trends, chemical bonding, crystal structures, and properties of elements and compounds for engineering entrance exams

13 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following statements are not correct about boron?

  1. Boron halides do not form dimers.
  2. Boron is a bad conductor of electricity.
  3. Boron exists in amorphous form only.
  4. The hydroxides and oxides of boron are amphoteric.
  5. The melting and boiling point of boron are lower than that of aluminium.
  6. Boron forms only covalent compounds.
  1. 1, 2 and 3
  2. 1, 4 and 6
  3. 2, 3 and 4
  4. 3, 4 and 5
  5. 3, 5 and 6
Question 2 Multiple Choice (Single Answer)

Which among the following statements is/are correct?

  1. All the noble gases, except radon, occur in the atmosphere.
  2. XePtF6 was the first noble gas compound.
  3. XeF2 has bent geometry.
  4. Noble gases have large positive values of electron gain enthalpy.
  1. 1 and 3
  2. 1, 2 and 4
  3. 1, 2, 3 and 4
  4. 2 and 3
  5. 2, 3 and 4
Question 3 Multiple Choice (Single Answer)

Which of the following are examples of tribasic acid?

  1. Metaphosphoric acid
  2. Pyrophosphoric acid
  3. Orthophosphoric acid
  4. Orthophosphorous acid
  5. Hypophosphorous acid
  6. Hypophosphoric acid
  7. Peroxyphosphoric acid
  1. 1 and 3
  2. 2 and 5
  3. 3 and 7
  4. 4 and 6
  5. 5 and 7
Question 4 Multiple Choice (Single Answer)

Which of the following statements regarding phosphine are incorrect?

  1. It is a trigonal pyramidal molecule.
  2. Point group of phosphine is C2v.
  3. The length of the P-H bond is 1.42 Å.
  4. The H-P-H bond angles are 109.5°.
  5. It is a polar molecule.
  1. 1 and 2
  2. 1 and 5
  3. 2 and 3
  4. 2 and 4
  5. 3 and 4
Question 5 Multiple Choice (Single Answer)

Identify the incorrect statements.

  1. HI has lower boiling point than HCl.
  2. UF6 is more covalent than UF4.
  3. All halogens can exhibit positive oxidation states.
  4. Bleaching action of chlorine is due to oxidation.
  1. 1 and 2
  2. 1 and 3
  3. 1 and 4
  4. 2 and 3
  5. 2 and 4
Question 6 Multiple Choice (Single Answer)

Which of the following alkaline earth metals crystallise in face centered cubic structure?

  1. Beryllium
  2. Magnesium
  3. Calcium
  4. Strontium
  5. Barium
  1. 1 and 2
  2. 1, 2 and 3
  3. 3 and 4
  4. 3, 4 and 5
  5. 4 and 5
Question 7 Multiple Choice (Single Answer)

Which of the following statements are correct about halogens?

  1. Fluorine is a stronger oxidising agent than chlorine.
  2. Halogens have maximum negative electron gain enthalpy in the corresponding periods.
  3. The negative electron gain enthalpy of fluorine is more than that of chlorine.
  4. The enthalpy of dissociation of F2 is more than Cl2.
  1. 1 and 2
  2. 1 and 4
  3. 2 and 3
  4. 2 and 4
  5. 3 and 4
Question 8 Multiple Choice (Single Answer)

Which of the following second row transition metals crystallise in face centred cubic lattice?

  1. Nb
  2. Mo
  3. Tc
  4. Ru
  5. Pd
  6. Ag
  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 4 and 5
  5. 5 and 6
Question 9 Multiple Choice (Single Answer)

Which of the following statements are not true?

  1. Sulphates and hydroxides of alkali metals are more soluble than those of alkali metals.
  2. Solubility of alkaline earth metal sulphates increases down the group.
  3. Solubility of alkaline earth metal hydroxides decreases down the group.
  4. Alkaline earth metal ions have greater hydration enthalpies than alkali metal ions.
  1. 1 and 2
  2. 1 and 3
  3. 2 and 3
  4. 2 and 4
  5. 3 and 4
Question 10 Multiple Choice (Single Answer)

Which of the following third row transition metals crystallise to form body centred cubic lattice?

  1. Tantalum
  2. Tungsten
  3. Rhenium
  4. Osmium
  5. Platinum
  6. Gold
  1. 1 and 2
  2. 2 and 3
  3. 3 and 4
  4. 4 and 5
  5. 5 and 6
Question 11 Multiple Choice (Single Answer)

Identify the incorrect statements.

  1. Alkaline earth metals have stronger metallic bonding than the corresponding alkali metals.
  2. Alkaline earth metals have higher densities than corresponding alkali metals.
  3. Melting points in alkaline earth metals are lower than for the corresponding alkali metals.
  4. Alkaline earth metal carbonates higher thermal stability than corresponding alkali metal carbonates.
  1. 1 and 2
  2. 1 and 4
  3. 2 and 3
  4. 2 and 4
  5. 3 and 4
Question 12 Multiple Choice (Single Answer)

Directions: In the question given below, there are two statements labelled as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:
Assertion: NF3 has dipole moment but, BF3 has not.
Reason: If the molecule is unsymmetrical, the resultant dipole moment of the molecule is not zero.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false
  4. A is false but R is true.
  5. Both A and R are false.
Question 13 Multiple Choice (Single Answer)

For which following properties Li has higher value than Na?

  1. Hydration enthalpy
  2. Thermal stability of hydride
  3. Stability of carbonate
  4. Basic character of hydroxide
  1. 1 and 2
  2. 1 and 3
  3. 1 and 4
  4. 2 and 3
  5. 3 and 4
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