Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which one among the following is not a property of salt?
Salts have ordered packing arrangements called lattices
Salts are brittle
Salt have low melting points but high boiling points
Salts conduct electricity when dissolved in water or even in the molton state
Which among the following statements with regard to pH scale is/are correct?
I. It is a logarithmic: scale
II. The scale is limited to 0-14 because the ionic product of water is about 10~14.
III. The lower the value of pH, the greater is the acidity of the solution.
Select the correct answer using the code given below
I and II only
I, II and III
I and III only
II only
An oxidizing agent is a substance which can
Accept electron
Donate electrons
Accept protons
Donate protons
Which one of the following statements about air pollution caused by diesel engines is correct ?
It produces large quantity of carbon monoxide at lower and high temperatures
It produces large quantity of nitrogen oxides at lower and high temperatures
It produces large quantity of carbon monoxide at lower temperature and nitrogen oxides at high temperature
It produces large quantity of nitrogen oxides at lower temperature and carbon monoxide at high temperature
Consider the following statements with regard to the properties of water
I. Water is a good solvent for ionic compound but poor solvent for covalent compound.
II. Water is a good solvent for covalent compound but poor solvent for ionic compound
III. Water has maximum density at the temperature 277° K.
Which of the statements given above are correct?
II and III only
