FILL IN THE BLANKS
1) The serial number of an element in the Periodic table is also its____ (atomic number/ mass number)
2) The metallic character___ in a Group as one moves from top to bottom.( increases/ decreases)
3) The metallic character___ in a period as one moves from left right.(increases/decreases)
4) ____is the most active non metal.(chlorine/iodine)
5) ___ is the most active metal (magnesium/Sodium)
6) An increase in nuclear charge ___ the tendency of an atom to accept electrons. (increases/ decreases)
7) The atomic size ___as one moves from left to right across a period (increase/ decreases)
8) The elements in a Group VIIA which is a liquid at room temperature is ___(F/Cl/Br)
9) Nuclear charge of an atom is the ____Negative/positive) charge on the nucleus of an atom equivalent to the atomic__ (number/mass)of an atom.
10) Atomic size of neon is___ than the atomic size of chlorine. (more/ less)
11) With increase to nuclear change the nuclear attraction for outer electron ____(increases/ decreases). Hence Ionisation potential.(increases/ decreases)
12) If an element has one electron in its outermost shell, then it is likely to be___(non metallic/ metallic)
13) The properties of elements are periodic functions of their___ (atomic numbers/mass numbers)
14) The elements below the sodium in the same Group would be expected to have a ___(lower/ higher) electronegativity than Sodium and the element above chlorine would be the expected to have a___(lower/higher) Ionisation potential than chlorine.
15) On moving from left to right in a given Period, the number of shells__(remains the same/increases/decreases)
16) On moving down a Group, the number of valence electros____ (remains the same/increases/decreases)
17) Two chlorine atoms combine to form a molecule. The bond between them is ___(ionic/ covalent)
18) In forming oxygen molecule,_ electrons are shared by each atom of Oxygen. (Two/three)
19) The number of single covalent bonds in a C₂H₂ molecules are___ (2/1)
20) Jn forming N₂ molecule, ____ electrons are shared by each atoms of Nitrogen. (3/2)
21) Two atoms of the same element combine to form a molecule. The bond between them is known as ___(ionic/covalent)
22) Methane is a ___compound. (covalent/ionic)
23) CCl₄ is a ___compound. (covalent/ ionic)
24) Halogens have a tendency to ___ electron readily. (lose/gain)
25) ___ is a process by which electrons are apparently removed from an atom or an ion. (Oxidation/reduction)
26) An oxidizing agent is___ of electrons (an accepter/a donor)
27) ____ compounds undergo ionic reactions. (Electrovalent/ covalent)
28) A ____bond is a pair of electrons shared by two atoms. (Ionic/covalent)
29) The bond in the hydrogen molecule is called a___ bond. (single/double)
30) A covalent bond that is shared equally between two bonded atoms is called a ___ covalent bond(polar/nonpolar).
31) The ability of an atom to attract shared electrons is called its ___.(electropositivity/ electronegativity)
32) A reaction between a base and an acid in their solutions to produce salts and water only is called ___reaction. (double decomposition/neutralisation)
33) All nitrates of metals are___. (soluble/insoluble)
34) Sodium chloride is __salt. (a hydrated/an anhydrous)
35) Chemical name of washing soda is ____.(sodium carbonate/ Sodium Sulphate)
36) sodium potassium sulphate is a _____.(Complex salt/mixed salt)
37) The number of replaceable Hydroxide ions formed by one molecule of a base in water is known as ____.(acidity/basicity)
38) An acid used to remove ink stains is ___.(citric acid/oxalic acid)
39) ammonium chloride is a soluble salt prepared by ___. (precipitation/neutralization)
40) The formula Sodium plumbate is______.
41) The colour of hydrated zinc sulphate is ____.(blue/white)
42. On adding aqueous solution of Ammonium hydroxide to ferric chloride. a ____colour precipitate of ferric chloride is formed. (reddish brown/sky blue)
43. The valency of Copper in copper sulphate is ___.(1/2)
44. zinc chloride solution reacts with caustic soda solution to give 8___ colored participate. (Red/white)
45. The salt of lead, soluble in hot water and in cold water is____. (Lead sulphate/lead chooride)
46. Powdered sodium chloride (common salt) does not conduct electric current. but it does so when dissolved in____.(alcohol/ water)
47. During electrolysis, ___ions move towards the cathode. (positive/negative)
48) In an electrolytic cell__ energy is consumed. (mechanical/ Electrical)
49) NaCl is a poor conductor of electricity in ____state. (molten/ solid)
50) Conducting nature of______ compound is due to free ions. (ionic/covalent)
51) Substances which conduct electricity in the solid state are generally___. (Metals/non metals)
52) The electron releasing tendency of zinc is ___thsn that of copper. (less/more)
53) The conductivity of an electrolyte ____with rise in temperature. (decreases/ increases)
54) During electrolysis of copper chloride___ is deposited at the cathode. (copper/chlorine)
55) cations are ___charged ions. (negatively/positively)
56) According to ionic theory the number of Ions___ with dilution in weak electrolytes (increases/ decreases)
57) _____ is a weak electrolyte as well as weak acid. (CH₃COOH/NH₄OH).
58) Fe + CuCl₂ ---> Cu+ ___.(FeC₃/FeCl₂
59) Pure water consists almost entirely of___ (Ions/ molecules)
60) We can expect that Pure water ___normally conduct electricity. (Will/will not (
61) As we descend the electrochemical series containing cations to get ___ at the cathode increases. (Oxidised/reduced)
62) The ___ the concentration of an ion in a solution, the greater is the probability of its being discharged at its appropriate electrode. (Higher/lower)
63) The metal plate through which an electric current enters into an electrolyte is called___. it has ___ of electrons.
64) A base as an electrovalent compound which when dissolved in water, dissociates into a positively charged____ ion and negatively charged___ Ion.
65) the ions which discharge on the negative electrode during electrolysis ___electrons and are called____.
66) In electrorefining of copper___ is deposited at the cathode and___ at the anode.
67) A salt is an electrolytic made up of a positive Ion other than___ Ion and a negative ions other than___ion.
68) With platinum electrodes hydrogen is liberated at the ___ and oxygen at the___ during the electrolysis of acidified water.
69) electrolysis is the passage of ___ through a liquid or a solution accompanied by a change __ change.
70) An____ is a homogeneous mixture of two or more metels or a metal and a ____.
71) The properties of an alloy are not necessarily____ between those of its ____. The melting point of an alloy is always less than that of its constitution_____.
72) An alloy in which ____ is present as one of the Constituents is called a____ alloy.
73) Alloy are made to develop certain____ properties not___ by elements.
74) The ore from which Aluminium is extracted must first be treated with ___so that pure aluminium oxide can be obtained
75) Pure Aluminium oxide is dissolved in ___to make a conducting solution.
76) When lead nitrate is heated. The Residue of ___is left. The gases founder are____ and ___.
77) The properties of an aqueous solution of nitric acid are due to the presence of hydrogen ___.
78) The property of Sulphuric Acid which is used in the laboratory preparation of Nitric acid is its ____nature.
79) The nitric acid prepared in laboratory is___ in colour but the pure concentrated acid is a___ liquid.
80) Compounds having the same molecular formula but having different structural formula are called ____(homologous/isomers)
81) Organic compounds are___ compounds. (ionic/covalent)
82) The organic compounds containing carbon and ___atoms only are called hydrocarbons.(oxygen/hydrogen)
83) Organic compounds are generally insoluble in____.(organic solvents/water)
84) C=C bond is ___than C-C bond. (Longer/ sorter)
85) An alkyl group is formed by removing a ___atom from the parent alkaline. (carbon/ hydrogen)
86) Ethanol containing some methanol added to it is called___ alcohol.(ethylated/methylated)
87) The next higher homologous of methanal is ___( propanal/ ethanal)
88) The conversion of Ethanol to ethene is an example of___ (dehydration/dehydrogenation)
89) converting ethanol to ethene requires the use of ___ (concentrated hydrochloric acid/ concentrated nitric acid/ concentrated sulphuric acid)
90) The conversion of Ethene to Ethane is an example of ____.(hydration/hydrogenation)
91) The catalyst used in the conversion of Ethene to Ethane is commonly ___(iron/Cobalt/Nickel)
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