Stalactites and stalagmites are formed by water dripping or flowing from fractures on the ceiling of a cave. The dominant mineral in them is calcite (calcium carbonate) or CaCaO₃. Their largest displays are formed in caves of limestone and dolomite. Other minerals that may be deposited include other carbonates, opal, chalcedony, limonite, and some sulfides.

Correct Option: A

Stalactites and stalagmites are formed by water dripping or flowing from fractures on the ceiling of a cave. The dominant mineral in them is calcite (calcium carbonate) or CaCaO₃. Their largest displays are formed in caves of limestone and dolomite. Other minerals that may be deposited include other carbonates, opal, chalcedony, limonite, and some sulfides.

A first-order reaction is a reaction that proceeds at a rate that depends linearly on only one reactant concentration. In other words, when the reaction rate depends on the first power of concentration of a single reactant,’ it is considered to be first order. The rate of reaction is directly proportional to the concentration of reacting substance. Absorption, distribution, elimination rates are examples of such reaction. The following graph represents concentration of reactants versus time for a first-order reaction: Concentration Time

Correct Option: C

A first-order reaction is a reaction that proceeds at a rate that depends linearly on only one reactant concentration. In other words, when the reaction rate depends on the first power of concentration of a single reactant,’ it is considered to be first order. The rate of reaction is directly proportional to the concentration of reacting substance. Absorption, distribution, elimination rates are examples of such reaction. The following graph represents concentration of reactants versus time for a first-order reaction: Concentration Time

The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.

Correct Option: D

The Bhopal gas tragedy involved the leakage of poisonous methyl isocyanate (MIC) gas and other chemicals at the Union Carbide India Limited (UCIL) pesticide plant in Bhopal, Madhya Pradesh, on the night of 2–3 December 1984. It is considered the world’s worst industrial disaster.

Sodium Nitrate (NaNO₃) is also known as Chile saltpeter or Peru saltpeter (due to the large deposits found in the Atacama desert in these countries) to distinguish it from ordinary saltpeter, potassium nitrate. Also known as soda niter, it is used in the production of fertilizers, pyrotechnics and smoke bombs, glass and pottery enamels, food preservatives, and solid rocket propellant

Correct Option: A

Sodium Nitrate (NaNO₃) is also known as Chile saltpeter or Peru saltpeter (due to the large deposits found in the Atacama desert in these countries) to distinguish it from ordinary saltpeter, potassium nitrate. Also known as soda niter, it is used in the production of fertilizers, pyrotechnics and smoke bombs, glass and pottery enamels, food preservatives, and solid rocket propellant

Sodium hypochlorite bleaches are also called chlorine or liquid household bleach. They are the more powerful laundry bleaches; they are used to whiten and disinfect laundry, is typically either 5.25 percent (regular strength) or 6 percent sodium hypochlorite (ultra strength).

Correct Option: B

Sodium hypochlorite bleaches are also called chlorine or liquid household bleach. They are the more powerful laundry bleaches; they are used to whiten and disinfect laundry, is typically either 5.25 percent (regular strength) or 6 percent sodium hypochlorite (ultra strength).