Chemistry Quiz 24
1 / 50
A sample of an iron and oxygen ore has a mass of 35.8 grams. The iron in the compound has a mass of 27.9 grams. What is the percent iron in the ore?
2 / 50
In the formation of Zwitter ions proton goes from____________________?
3 / 50
Seventh period contains _________________ normal elements ?
4 / 50
Which of the following will decompose to produce litharge_________________?
5 / 50
Rate of reactions of most organic compounds are____________________?
6 / 50
the fractional distillation of petroleum produces gasoline up to ________________?
7 / 50
The ionization energy__________________?
8 / 50
Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
9 / 50
Which element was not known when Mendeleev proposed his classification ?
10 / 50
In which compound of Xenon the oxidation state of Xenon is + 6?
11 / 50
A single chlorine free radical can destroy how many ozone molecules ?
12 / 50
Compounds attracted by applied strong magnetic field are called__________________?
13 / 50
Which one of the following looks odd__________________?
14 / 50
For which of the following compounds the term empirical formula cannot be applied ?
15 / 50
The structure of ethyne is_________________?
16 / 50
Calcarious material includes_________________?
17 / 50
When the reaction completes in more than one steps rate of reaction will be determined by________________?
18 / 50
The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called________________?
19 / 50
Geometric isomerism is usually found in___________________?
20 / 50
A great variety of the organic compounds is due to its property of carbon_________________?
21 / 50
Solution with maximum concentration of solute at given temperature is called________________?
22 / 50
Phosphoric acid is a weak acid and its basicity is____________________?
23 / 50
Absolute alcohol is obtained when rectified spirit is treated with__________________?
24 / 50
The percentage of nitrogen in urea is________________?
25 / 50
A substance which increases the reactivity of enzyme is called_________________?
26 / 50
The number of molecules taking part in the rate determining step is called___________________?
27 / 50
Which of the following is an amide________________?
28 / 50
The irritation caused by red ants bite is due to____________________?
29 / 50
The octet rule does not always hold for which of the following elements _________________?
30 / 50
Quantum number values for 3p orbitals are____________________?
31 / 50
In 1 ? pentene -4- yne the carbon exhibit hybridization_________________?
32 / 50
Which one has maximum number of unpaired electrons ?
33 / 50
The geometry of ammonia is___________________?
34 / 50
Second ionization potential of alkali metals are very high due to_______________?
35 / 50
A double bond consists of __________________?
36 / 50
Conjugated base of a weak acid is_________________?
37 / 50
Ionization energy in a period generally ___________________?
38 / 50
Which one of the following alkali metals forms only normal oxide when it reacts with O2 ?
39 / 50
The kinetic molecular theory of gases was put forward in 1738 by _____________________?
40 / 50
In crystallization if the solvent is inflammable then direct heating is________________?
41 / 50
The halogen which reacts spontaneously with gold (Au) to form Au+3 is ________________?
42 / 50
Which allotropic form of phosphorous is the most stable ?
43 / 50
Photographic plates are coated with a thin film of _________________?
44 / 50
The metallurgical process in which a metal is obtained in a fused state is called__________?
45 / 50
An alcohol which can be prepared by fermentation is_________________?
46 / 50
In sp3 hybridization the expected geometry of molecules will be__________________?
47 / 50
In the complex [Cr(OH)3(H2O)3] the coordination number is __________________?
48 / 50
The molecules of which gas have highest speed?
49 / 50
In which of the following equilibria will Kc and Kp have the same value ?
50 / 50
Which of the following molecule is polar__________________?
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