Chemistry Quiz 15
1 / 50
Formaldehyde condenses with phenol in the presence of dilute H2SO4 to yield________________?
2 / 50
With impurities like P and S the open hearth furnace is lined with ?
3 / 50
A reaction has values of ?H and ?S which are both positive. The reaction __________________?
4 / 50
K2Cr2O7/H2SO4 generate____________________?
5 / 50
Which of the following statements is incorrect about halogens ?
6 / 50
Increase in atomic number is observed during_________________?
7 / 50
In the production of wrought iron Mg Si and P are removed in the form of___________________?
8 / 50
Equilibrium state is achieved quickly by the addition of ________________?
9 / 50
The concept of ensemble was introduced by____________?
10 / 50
Which is sold as fertilizer ___________________?
11 / 50
During sulphonation of benzene H2SO4 generates the electrophile _________________?
12 / 50
The common name of propane -1 3-dioic acid is____________________?
13 / 50
Nitrates of which pair of elements give different products on thermal decomposition ?
14 / 50
Which law states that ?equal volumes of all gases, at the same temperature and pressure, have the same number of molecules?
15 / 50
The earth absorb radiation in Visible range but emit radiation at the same rate in the:
16 / 50
Which of the following is true in the case of Zn-Cu cell ?
17 / 50
Boiling points of hydrocarbons increase with the increase in number of carbon atoms. It is mainly due to_________________?
18 / 50
Voltaic cell can be recharged by______________?
19 / 50
The atomic radii decreases by increasing atomic number in________________?
20 / 50
Positive rays give flash on________________?
21 / 50
Hydrogen effuses four times more rapidly than volume of an unknown gas molar mass of unknown gas should be_______________?
22 / 50
An acid with unpleasant smell_________________?
23 / 50
Which of the following alloys contain(s) Cu and Zn?
24 / 50
Methyl alcohol is not used__________________?
25 / 50
Which of the following technique is simple and efficient to purify a substance____________________?
26 / 50
A 10 volume solution of H2O2 means_______?
27 / 50
CO2 is gas while SiO2 is solid at room temperature?
28 / 50
Order of ease of halogenation in alkane is________________?
29 / 50
Which one of the following is not a semiconductor ?
30 / 50
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
31 / 50
Benzene gives mainly_________?
32 / 50
95% ethanol is called_________________?
33 / 50
The Lewis acids are__________________?
34 / 50
Solubility of CaF2 is 2.0?10-4 gdm-3 then Ksp of CaF2 is_______________?
35 / 50
Atoms of all the elements always contain in nucleus:
36 / 50
Isotopes differs in______________________?
37 / 50
Concept of Triads was introduced by_______________?
38 / 50
Noble gases are named so because they are__________________?
39 / 50
The scientist who did not contribute in the construction of periodic table ?
40 / 50
Which of the following phenomenon is considered responsible for Global Warming?
41 / 50
Nitration of chlorobenzene gives___________________?
42 / 50
Special features of borate glass is that it is_________________?
43 / 50
Borax is a white crystalline solid and it is_________________?
44 / 50
A theoretical link between quantum mechanics and thermodynamics is_________?
45 / 50
According to vital force theory_______________?
46 / 50
If internal energy of the system is increased ____________________?
47 / 50
The half cells are interconnected through________________?
48 / 50
Regular coiling or zigzagging of polypeptide through hydrogen bonding is its___________________?
49 / 50
E0red of an element cab be calculated by comparing it with _____________________?
50 / 50
Find the PH of a 0.001 M solution of Nitric acid HNO3?
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