Which metal is heaviest ?
The electron emitted in beta radiation originate from
The main use of salt in the diet is to:
The items amenable to detection by soft x-rays are:
Alkyl halides react with dialkyl copper reagents to give:
Which of the following pairs are correctly matched?
(1) Isotopes : Atoms with same atomic number but different atomic mass.
(2) Isobars : Atoms with same number of neutrons but different atomic number.
(3) Isotones : Atoms with same mass number but different atomic number.
Select the correct answer using the codes given below :
Which metal is heaviest ?
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.
Consider the following statements
(1) Most of the metal oxides are insoluble in water.
(2) Sodium oxide and potassium oxide are metal oxides and hence insoluble in water. The correct answer is:
What do metal atoms lose to form positively charged ions?
The major constituent of air is:
3 g of activated charcoal was added to 50 mL of acetic acid solution (0.06 N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is :
The number of moles of solute present in 1 kg of a solvent is called its:
The metallurgical process in which a metal is obtained in a fused state is called ?
Which among the following is the correct decreasing of bioelements in Human Body?
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Hubble’s law is based on the:
What are reactive metals called?
Which gas is used in fire extinguishers ?
The octane number of zero is assigned to:
Which of the following elements behave chemically both as a metal and a non metal?
What is the role of ultraviolet (UV) radiation in the water purification system?
(1) It inactivates / kills the harmful micro- organisms in water.
(2) It removes all the undesirable odours from the water.
(3) It quickens the sedimentation of solid particles and improves the clarity of water.
Which of the statements given above is/are correct?
White Phosphorous is represented by which among the following symbols?
The single acid which dissolves gold is ?
The highest electrical conductivity of the following aqueous solutions is of:
The blue colour of water in the sea. What is the reason behind the phenomenon?
Which one has the highest boiling point?
The difference between a nuclear reactor and atomic bomb is that:
What does Nucleus consist of?
Heating mixture of Cu2O and Cu2S will give:
The disperse phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged, respectively, which of the following statements is NOT correct?