Related MCQs

• Q. Fill in the blank: Any reaction that produces a ………….. is called a precipitation reaction
• Q. When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like
• Q. Which of the following is an iron ore?
• Q. In rusting of iron, reddish brown coating formed on iron is …………..
• Q. An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic
• Q. An aqueous solution turns red litmus solution blue. Excess addition of which of the following soluti
• Q. At the time of Mendeleev, the number of elements known was
• Q. When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula
• Q. Fill in the blank: Bleaching powder can be prepared by reacting …………….
• Q. An atom of an element has the electronic confi-guration 2,8,2. To which group does it belong?