741: What is 'Greased Lightning-10 (GL-10)', recently in the news?
(a) Electric plane tested by NASA
(b) Solar-powered two-seater aircraft designed by Japan
(c) Space observatory launched by China
(d) Reusable rocket designed by ISRO
742: With reference to the scientific progress of ancient India, which of the statements given below are correct?
1. Different kinds of specialized surgical instruments were in common use by 1st century AD.
2. Transplant of internal organs in the human body had begun by the beginning of 3rd century AD.
3. The concept of sine of an angle was known in 5th century AD.
4. The concept of cyclic quadrilaterals was known in 7th century AD.
Select the correct answer using the codes given below :
(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 3 and 4 only
(d) 1, 2, 3 and 4
743: The Panda belongs to the same family as that of
(a) Cat
(b) Rabbit
(c) Bear
(d) Dog
744: Consider the following statements:
1. The albedo of an object determines its visual brightness when viewed with reflected light.
2. The albedo of Mercury is much greater than the albedo of the Earth.
Which of the statements given above is/ are correct?
(a) Neither 1 nor 2
(b) Both 1 and 2
(c) 2 only
(d) 1 only
745: Which of the following pairs is not correct?
(a) Seismograph : Earthquakes
(b) Anemometer : Speed of the wind
(c) Hygrometer : Water vapour content of the atmosphere
(d) Lactometer : Specific gravity of liquids