If one of the following oxides is heated with hydrogen or carbon using a bunsen burner. it is not reduced to the metal, Which one is it?
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2018
What volume of oxygen will remain after reacting 8cm of hydrogen gas with 20cm of oxygen gas
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2018
The number of electrons in the valence shell of an element of atomic number 14 is?
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2018
Suitable reagents for the laboratory preparation nitrogen are
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2018
A quantity of electricity liberates 3.6g of Silver from its salt. What mass of aluminium Will be liberated from its salt by the same quantity of electricity? [Al = 27, Ag = 108].
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2018
Methanoic acid mixes with water in all proportions and has about the same boiling point as water. Which of the following methods would you adopt to obtain pure water from a mixture of Sand, water and methanoic acid?
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2018
In the preparation of oxygen by heating KCIO, in the presence of MnO\(_2\) only moderate heat is needed because the catalyst acts by \(_2\)
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2018
Which of the following pairs of substances will react further with oxygen to form a higher oxide?
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2018
The boiling of fat and aqueous caustic soda is referred to as
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2018
In the shown experiment (Fig. 1) the litmus paper will initially
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2018
If 1 litre of 2.2M sulphuric acid is poured into a bucket containing 10 litres of water and the resulting solution mixed thoroughly, the resulting sulphuric acid concentration will be
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2018
The periodic classification is an arrangement of the elements
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2018
Which of the following statements is correct about the periodic table?
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2018
On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure
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2018
A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that
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2018
A correct electrochemical series can be obtained from Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au by interchanging
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2018
The Consecutive members of an alkane homologous series differ by
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2018
An element used in the production of matches is
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2018
According to the Kinetic Theory an increase in temperature causes the kinetic energy of particles to
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2018
To what temperature must a gas at 273k be heated in order to double both its volume and pressure?