Which of the following is produced during the formation of photochemical smog ?
The symbol Ag stands for which element?
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is:
How many nearest neighbours are there for an atom in a hexagonal close-packed crystal structure?
The graphite rods in the nuclear reactor:
In Periodic table vertical columns are called ____________.
Which among the following happens in an oxidation reaction ?
Which of the following substances is/are ozone depleting? Select the correct answer from the codes given below:
(1) Chlorofluorocarbons
(2) Halons
(3) Carbon tetrachloride
Which of the vitamins given below is water soluble ?
The lanthanide contraction is responsible for the fact that:
The most abundant element in the earth's crust is ?
Biogas majorly contains ?
The vapour pressure of toluene is 6.811 kPa at 310 K and 24.15 kPa at 340 K. Assuming that the variation of the vapour pressure p with temperature T may be described by the expression What are the values of A and B?
Consider the following statements regarding diamond:
(1) It is an allotrope of silicon.
(2) It is a bad conductor of heat and electricity.
(3) It is the hardest substance.
(4) It burns to produce carbon dioxide.
Which of the statements given above are correct?
A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statements about these chlorides is correct?
Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains:
Sodium stearate is a salt and is used:
Which polymer is used in the manufacture of paints and lacquers?
In cold weather, aquatic animals survive even when water to the top layer of the lake freezes into ice because:
Ions are charged particles that form when atoms ____________.
Which among the following element is an essential constituent of acids?
The acid generally stored in batteries is:
What are reactive metals called?
Consider the following statements : The purpose of adding sodium sulphate and sodium silicate to washing powder is -
(1) To keep washing powder dry
(2) To maintain the alkalinity of the powder which of these statements is/are correct ?
The most important ore of aluminium is:
The items amenable to detection by soft x-rays are:
X-ray beam coming from an X-ray tube will be:
The most electronegative element among the following is :
Which of the following is / are correct statements about Inert Gases?
(1) They have Zero Valency
(2) They don’t undergo chemical reactions
Select the correct option from the codes given below: