Question 1 :
A magnesium ion has a net positive charge while the magnesium atom has __________. 
Question 4 :
We have $$CuSO_4$$ solutions (blue) in two beakers A and B. In beaker A we add Ag pieces and in B we add Zn pieces. What will happen in A if :<br/>1. $$Cu^{2+}$$ is reduced to Cu<br/>2. no reaction.
Question 6 :
During electrolytic refining of copper.<br/>(a) Pure copper acts as anode.<br/>(b) Pure copper acts as cathode.<br/>(c) Impure copper acts as anode.<br/>(d) Impure copper acts as cathode.<br/>
Question 10 :
The process of protecting iron by coating with zinc is called:
Question 12 :
 Galvanizing is a process of coating iron with a metal to prevent it from rusting. The metal is :
Question 14 :
The second most abundant metal present in the crust of the earth is :
Question 15 :
Which one of them is more ionic $$LiCl$$ or $$NaCl$$ ?
Question 16 :
The structure of glycine (amino acid) is $$H_{2}N-CH_{2}COO^{-}$$ ($$z$$ witter ion). Select the correct statement:-
Question 17 :
When an element of very low ionization potential reacts with an element of very high electron affinity, then :
Question 21 :
State whether true or false :<br/><br/>All the elements having one electron in their outermost shell are metals.
Question 24 :
Assertion: Ionic compounds are bad conductors of electricity.
Reason: In ionic compounds mobile ions exists.
Question 25 :
The attraction between molecules and salt, when a salt is dissolved in water molecules, is :
Question 26 :
Which of the following metals exist in their native state in nature?<br/>(i) Ca<br/>(ii) Au<br/>(iii) Zn<br/>(iv) Ag<br/>
Question 27 :
Read the following statements and answer as true or false.<br/>Metals occur in nature only as free elements.<br/>
Question 28 :
Galvanisation is a method of protecting iron from rusting, by coating with a thin layer of:<br/>
Question 31 :
The complete loss of an electron of one atom to another atom with the consequent formation of electrostatic charges is said to be
Question 32 :
An ore contains arsenic and antimony as impurities. How are they removed during the process of roasting?<br/>
Question 34 :
In case of formation of ionic compounds, the electronegativity difference between them is less than 1.7.<br/>
Question 36 :
Electrolysis is used in the extraction of metals from their ores.
Question 38 :
Separation of impurities from the extracted metals is known as __________.
Question 41 :
Heating of concentrated ore in absence of air, for conversion into oxide ore, is known as ____.<br/>
Question 44 :
On the basis of following features identify the correct option:<br/>I. This metal is not obtained in free state.<br/>II. This metal is obtained by electrolysis of their chlorides in molten state.
Question 47 :
Process of depositing a thin layer of zinc metal on iron objects is called:
Question 50 :
During the formation of sodium chloride, sodium transfers one electron to chlorine to attain the configuration of which noble gas?
