Entrance Exam Questions of Class 11 (Chemistry Page 1)

These are Probable Question asked in the Entrance Examination Held in renowned colleges(St. Xaviers, Budhanilkantha, SOS,..etc) in Nepal. 

(note: "#" Indicates the power of given term)

Entrance Examination Traning Software for the SLC Graduates for +2

Question	Option1	Option2	Option3	Option4	Ans
Which of the following oxide imparts the green colour in the glass?	PbO	Cr$2O$3	Fe$2O$3	ZnO	2
Froth floatation is the process of concentration of which of the ores?	Oxide	Sulphide	Carbonate	Sulphate	2
Which of the following is known as philosophers wool?	ZnSO$4.7H$2O	ZnO	FeSO$4.7H$2O	FeO	2
The rxn NH$4 CNO NH$2 – CO – NH$2 is of the type:	Oxidation –reduction	Isomerization	Neutralization	Analysis	2
Who is the father of chemistry?	Dalton	Berzellius	Lavosier	None	3
Formalin is used as:	Disinfectant reagent	Preservation of biological specimens	Both a and b	None	3
Monomer of Bakelite plastic is:	phenol + formaldehyde	carbolic acid + Acetaldehyde	phenol + ethyl alcohol	None	1
Who has discovered molecule term?	Dalton	Avogadro	Rutherford	None	2
Who has discovered nucleus of the atom?	Avogadro	Rutherford	Neil Bohr	None	2
Galena is the ore of:	Silver	Magnesium	Lead	copper	3
Molecular formula of plaster of Paris is:	CaSO$4.H$2O	(CaSO$4)$2.H$2O	CaSO$4.2H$2O	None	2
Molecular formula of green vitriol is:	CuSO$4.5 H$2O	FeSO$4.7H$2O	ZnSO$4,. 7H$2O	MgSO$4.7H$2O	2
Which of the following statement is not true for ethyne gas?	It is an unsaturated hydrocarben	It is the monomer of benzene	It satisfies the formula Cn H$2n -2	Benzene is natural polymer	4
Haematite is the ore of:	Zinc	Copper	Iron	None	3
A gas Y burns in air and adsorbed by palladium metal is:	Nitrogen	Oxygen	Hydrogen	None	3
The gas which is obtained by heating potassium nitrate, is absorbed by alkaline pyrogallate solution is:	N$2	O$2	NH$3	NO$2	2
BHC is an example of:	Fertilizer	Antiseptic	Insecticides	None	3
Iodine of Tincture is:	Antiseptic	Analgesic	Both a and b	None	3
Molecular formula of Bleaching powder is:	Ca(OCl)Cl	CaOCl	Ca(OCl)$2	None	1
Molecular formula of lunar caustic is:	KOH	NaOH	AgNO$3	None	3
Litharge is the ore of:	Zinc	Lead	Tin	Iron	2
How many grams of NaOH are needed to make 100 gram of a 5% solution?	0.5	5	20	None	2
How many grams of CO$2 can be prepared from 150 gram of calcium carbonate reacting with an excess of hydrochloric acid solution?	66	22	33	None	1
All of the following are compounds except:	Copper Sulphate	Carbondioxide	Washing Soda	Air	4
In general, when metal oxides react with water, they form solutions that are:	Acidic	basic	Neutral	None	2
Electrolysis of a dilute sodium chloride solution results in the cathode product is	Sodium	Hydrogen	Chlorine	Oxygen	2
A component whose molecular mass in 90 grams contain 40.0% carbon, 6.67% Hydrogen and 53.33% oxygen. What is true formula for the compound?	C$2H$2OH	CH$2O$4	C$3H$6O$3	C$3HO$3	3
How many moles of CaO are needed to react with an excess of water to form 370 gram of calcium hydroxide?	1	5	3	4	2
An organic compound has been found to possess the empirical formula CH$2O and molecular weight 90. Give its molecular formula (C = 12, H = 1, O = 16)	CH$3COOH	HCOOH	C$6H$12O$6	C$3H$6O	4
An organic compound on analysis was found to contain 10.06% carbon, 0.84% hydrogen and 89.1% chlorine. Calculate its empirical formula.	CHCl$2	CH$2Cl$2	CH$2Cl$3	CHCl$3	4
Which one is physical change?	burning of S in air	burning of C in air	corrosion of metal	conversion of white phosphorus to red phosphorus	4
How much sodium iodide will saturate 60 grams of water at 20°C, if its solubility be 178.	100	96	106.8	206	3
How many electrons are present in Fe+++ ion?	23	24	25	26	1
20 gram of a solution saturated with a salt at 80°C is cooled to 30oC. How much of the salt will crystalise out of the solution, if its solubility at 80°C and 30°C are 100 and 25 respectively?	15 gram	9 gram	6 gram	7.5 gram	4
When the ammonium nitrite is heated, we get:	O$2	N$2	NH$3	None	2
The ionic compound formed in between Gr I and Gr VII in periodic table is:	CaCl$2	AlCl$3	CCl$4	NaCl	4
You are given AgCl in aqueous solution, how would you separate AgCl?	sublimation	atmolysis	solvent extraction	filtration	4
Calculate the total no. of electrons present in 1.6 gm of methane if gram mol. weight of methane = 16g.	6.023 × 10#23	6.023 × 10#-23	6.023 ×10#21	6.023 × 10#20	1
Element used in photoelectric cell is:	Li	Na	Cs	Fr	3
The number of water molecules present in 1 litre of water is:	18	18 × 1000	NA	55.55NA	4
Which has maximum number of atoms?	24 gm of C(12)	56 g of Fe (56)	26 gm of Al (27)	108 gm of Ag (108)	1
Positron is anti-particle of electron. Positron is:	-1e#0	+1e#0	1H#1	+1e#-1	2
The correct ground state electronic configuration of chromium atom (At No: 24) is:	[Ar] 3d54s1	[Ar]3d4s2	[Ar]3d6s6	[Ar]4d54s1	1
Diagonal relationship is shown by elements of second period. Diagonal relation exists between:	Li and Mg	Na and Mg	K and Mg	Al and Mg	1
If the valence shell structure of an element is ns2np5, this element belong to:	alkali metal	inert metal	alkaline earth metal	halogens	4
The size of following species in increasing order is correct in:	I-<I<I+	I< I+ < I-	I+<I<I-	I-<I+<I	3
Which of the following has highest affinity for haemoglobin?	CO$2	CO	C	Blood	2
The liquefied petroleum gas mainly contains:	methane + ethane	ethane + propane	butane + isobutene	methane + propane	3
Commercially Hydrogen is obtained from:	coal gas	oil gas	marsh gas	producer gas	3
The acid anhydride of HNO$3 is:	NO$2	N$2O$4	NO$3	N$2O$5	3
Tear gas is chemically:	acetyl salicylic acid	chloropicrin	phenyl isocyanide	carbon monoxide	2