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Which of the following are chemical changes?
I. cooking of food
II. digestion of food
III. freezing of water
IV. water is heated up
A 'breath test' used by traffic police to check drunken driving uses?
The inherited traits of an organism are controlled by?
Oxygen is absent in?
A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the
concentration of the solution in terms of mass by mass percentage
The reactivity of fluorine is due to?
The compounds made up of only carbon and hydrogen are called?
220g of carbon dioxide contains ----- moles
The gas which causes global warming is?
Which of the following is a non-metal that remains liquid at room temperature?
Give the common name for the following compound: (CH3)2CHCH2-Br
The mass number of a nucleus is?
The nucleus of a hydrogen atom consist of a?
A binary compound of oxygen with another element is referred to as?
The molar enthalpy change accompanying the removal of an electron from a gas phase atom or
ion in its ground state is called?
A chemical process in which there is a gain of electrons is known as?
The enzyme that converts glucose to ethyl alcohol is?
The nucleus of an atom consists of?
The fourteen elements (atomic number 90-103) after actinium are called?
Which one of the following is not a mixture?
The only metal that is anti-bacterial is?
The scientist who stated that matter can be converted into energy is?
What is the chemical name for the compound CuCO3?
In troposphere, the two types of pollutants are?
One of the following is not a physical property of monosaccharides?
Soaps clean surfaces on the principle based on
Which of the following is a form of calcium carbonate?
I. limestone
II. marble
III. chalk
Iv. egg-shells
The most abundant rare gas in the atmosphere is?
The heat required to raise the temperature of the body by 1k is called?
The reactions involving simultaneous oxidation and reduction?
The maximum electron in N shell is?
The metal used to recover copper from a solution of copper sulphate is
Neutrons were discovered by?
An element having the atomic number 17 will resemble which of the following elements having
atomic number as given below?
A sample of any of the following substances disappears after some time when exposed to air
like camphor, naphthalene, or dry ice. This phenomenon is called?
The mass of one Avogadro number of helium atoms is?
The process or act of extracting a metal from its ore and refining it is called?
The atomic weight of nitrogen is?
What is the IUPAC name for the following compound? HC≡CCH3
The process by which salt and water reacted in a limited way to form an acid or a base is?
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