Chemistry Test 59

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Chemistry Test 59

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following is incorrect match for Bravais lattices of given crystal system -

A
Tetragonal → Body centred

B
Hexagonal → End centred

C
Monoclinic → end centred

D
Orthorhombic → Primitive
Question 2
4 / -1

For the bimolecular gaseous reaction :

2R(g) → Product, the fraction of molecules having sufficient energy for effective collision is 2.06 × 10^–9 at 127°C. The activation energy for reaction is about (ln 2.06 = 0.727, ln 10 = 2.303) -

A
16 kJ/mole

B
16 kcal/mole

C
8 kcal/mole

D
80 kcal/mole
Question 3
4 / -1

An aqueous solution contains 4% (w/v) NaOH and 5.3% (w/v) Na₂CO₃. 40 ml of this solution is titrated with 2.0 M- HCl solution, using phenolphthalein indicator. The volume of HCl solution needed for end point is.

A
30 ml

B
40 ml

C
20 mL

D
35 ml
Question 4
4 / -1

A sample of H-atoms in ground state absorb the electromagnetic radiations of x eV/quanta. Subsequantly, the sample emit radiations of 15 different photon energies. The energy of emited photon of longest wavelength is -

A
11x / 875 eV

B
35x / 36 eV

C
x / 36 eV

D
9x / 384 eV
Question 5
4 / -1

Write the IUPAC name of the following complex [Co(NH₃)₃(σ-C₃H₅)(en)]SO₄.

(I) η¹-allyltriamineethylenediamine cobalt(III) sulphate

(II) η¹-allyltriammineethylenediamine cobalt(III) sulphate.

(III) Triamminecyclopropylethylelnediamine cobalt(III) sulphate.

(IV) Triamminecyclopropylethylenediamine cobaltate(III) sulphate.

A
II only

B
I & II only

C
II & III only

D
II, III & IV only
Question 6
4 / -1

Which of the following ores is the ore of copper?

A
Cerrusite

B
Siderite

C
Chalcanthite

D
Sphalerite