1656: Sparkling red colour after the blast of fire crackers is due to the presence of:
(a) Strontium
(b) Sodium
(c) Sulphur
(d) Magnesium
1657: With reference to medieval Indian rulers, which one of the following statements is correct ?
(a) Alauddin Khalji first set up a separate ariz's department
(b) Balban introduced the branding system of horses of military
(c) Muhammad bin Tughlaq was succeeded by his uncle to the Delhi throne
(d) Firoz Tughlaq set up a separate department of slaves
1658: Sun's halo is produced by the refraction of light in
(a) Water vapour, in Stratus clouds
(b) Ice crystals in Cirro-Cumulus clouds
(c) Ice crystals in Cirrus clouds
(d) Dust particles in Stratus clouds
1659: Which one of the following Union Ministries implements the Cartagena Protocol on Biosafety?
(a) Ministries of Health and Family Welfare
(b) Ministries of science and technology
(c) Ministry of Environment and Forests
(d) Ministry of Chemicals and Fertilizers
1660: Which of the chronological order for the construction of the following is correct?
I. Taj Mahal
II. Qutab Minor
III. Fatehpur Sikri
IV. Agra Fort
(a) II, IV, III, I
(b) II, IV, I, III
(c) I, II, III, IV
(d) II, III, IV, I