Q1541.What is the mass number of an element, the atom of which contains two protons, two neutrons and two electrons?
Correct answer: 4
Q1542.Teflon is a polymer of which of the following monomers?
Correct answer: Tetrafluoroethylene
Q1543.Cooling is done by
Correct answer: Release of compressed gas
Q1544.The digital computer was developed in
Correct answer: Britain
Q1545.The atoms, in which the number of protons is same but the number of neutrons is different, are known as
Correct answer: Isotopes
Q1546.Teflon is the common name of
Correct answer: Polytetrafluoro ethylene
Q1547.In which of the following conditions wet clothes will dry earliest?
Correct answer: 20% RH, 60ºC temperature
Q1548.The first Computer was made by
Correct answer: Charles Babbage
Q1549.Radioactivity was discovered by
Correct answer: Becquerel
Q1550.Which one of the following substances is used in glazing the pottery?
Correct answer: Zinc oxide
Q1551.Which one of the following changes occurs when salt is added into the water?
Correct answer: Boiling point is increased and freezing point is decreased
Q1552.Who is considered to be the ‘Father of Computers’?
Correct answer: Charles Babbage
Q1553.Isotopes are those atoms of the same element which have
Correct answer: Atomic mass is different but atomic number is same
Q1554.Which among the following is not a polymer?
Correct answer: Caprolactam
Q1555.On adding common salt to water, the boiling point and freezing point of water will
Correct answer: Increase and decrease respectively
Q1556.For which word, the letter ‘G’ has been used in ‘2G Spectrum’?
Correct answer: Generation
Q1557.Isotopes is that nuclei of atomic nucleus in which
Correct answer: Number of protons is same but number of neutrons is different
Q1558.Phenol is used in the manufacture of which one of the following?
Correct answer: Bakelite
Q1559.To keep drinks at the same temperature for quite sometime, the walls of thermos bottle are coated with
Correct answer: Silver Layer
Q1560.A pen drive is
Correct answer: A removable secondary storage unit