Which of the following is/are not use(s) of glycerol. Glycerol is used?
(1) As a sweetening agent in beverages and confectionery
(2) As an antifreeze in automobile radiators
(3) As a lubricant for heavy machinery
(4) For preparation of better quality of soaps and cosmetics.
Which of the following is correctly matched?
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called:
Which of the following is/are not correctly matched?
(I) Absolute alcohol – 100% ethanol
(II) Power alcohol – 90 – 95% ethanol
(III) Rectified spirit – 5% ethanol
You can't live without iron. Where in the body is most of the iron located?
The metal used to recover copper from a solution of copper sulphate is ?
The compound that has the least value for octane number is :
Consider the following statements:
(1) A molecule of sulphur contains 4 sulphur atoms.
(2) Metals placed below hydrogen in activity series lose electrons to H+ ions of acids.
(3) Silver acquires a blackish tinge when exposed to air for a long time.
Which of these statement(s) is/are correct ?
Which one of the following pairs is mismatched
Water drops are spherical because of ?
Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?
The pyrimidine bases present in DNA are:
What does the airbag, used for safety of car driver, contain?
Hubble’s law is based on the:
Consider the following statements:
If there were no phenomenon of capillarity
(1) It would be difficult to use a kerosene lamp.
(2) One would not be able to use a straw to consume a soft drink.
(3) The blotting paper would fail to function.
(4) The big trees that we see around would not have grown on the earth.
Which of the statements given above are correct?
Which one of the following pairs is correctly matched?
The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation:
The most abundant element in the earth's crust is ?
The order of appearance of the following with increasing temperature during the refining of crude oil is:
Alkanes are ____________.
The main active constituent of tea and coffee is:
For a galvanic cell, which of the following statements is never true?
The main use of salt in the diet is to:
Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces:
The heat energy produced when the human body metabolises 1 gram of fat is:
Which one has the highest boiling point?
Conduction band electrons have more mobility than holes because they are:
Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?