Which of the following compounds is not soluble in HNO3--?
Which of the following compounds is not soluble in HNO3--?
PbS | |
CdS | |
CuS | |
AgCl |
پاک اسٹڈی لائبریری اپنی خدمات کو بہتر کرنے کے لئے نئے سوفٹ وئیر انسٹال کررہی ہے ۔ اس لئے آئندہ کچھ دن آپ کو کچھ صفحات تک رسائی میں مشکلات کا سامنا ہوسکتا ہے ۔ جس کے لئے ہم معذرت خواہ ہیں۔
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Which of the following compounds is not soluble in HNO3--?
PbS | |
CdS | |
CuS | |
AgCl |
Which of the following compounds has the empirical formula CH2O and reacts with sodium hydroxide ?
ethanol | |
methanoic acid | |
acetic acid | |
carbonic acid |
Which of the following cell is not rechargeable ?
Fuel cell | |
Silver oxide cell | |
Ni-Cd cell | |
Lead storage battery |
Which of the following cannot exist in solution---------?
H+ | |
Cl- | |
O-2 | |
Na+ |
Which of the following can form a chealate-----------?
oxalato | |
ammine | |
cyano | |
carbonyl |
Which of the following can be used in laptops ?
Lead accumulator | |
Nickel cadmium cell | |
Fuel cell | |
Silver oxide battery |
Which of the following can be separated by ” Sublimation Method”?
Both A & B | |
Sand and Naphthalene | |
None | |
Sand and Iron Filing |
Which of the following are the conditions of colligative properties--------?
Non-volatile solute | |
All of the above | |
Dilute solution | |
Non-electrolye solute |
Which of the following are isoelectronic species ?
Li+ Na+ K+ | |
H+ H H- | |
C1- Br- I | |
F- Ne Na+ |
Which of the following aqueous solutions would have the highest boiling point?
0.15 m CaCl2 | |
0.20 m glucose | |
0.20 m NaCl | |
0.25 m sucrose |
Which of the following always increases on going from top to bottom in a group ?
Oxidizing power | |
Tendency to get reduced | |
Electronegativity | |
Metallic character |
Which of the following alloys contain(s) Cu and Zn?
Gun-metal | |
Type metal | |
Bronze | |
Brass |
Which of the following aldehydes shows rapid reaction with sodium nitroprusside ?
benzaldehyde | |
acetone | |
accetaldehyde | |
formaldehyde |
Which of the following air pollutants is more dangerous for ozone layer ?
CO | |
CO2 | |
CFC | |
Oxides of nitrogen |
Which of the elements show passivity when treated with conc. HNO3?
Fe | |
Cr | |
All of the above | |
A |
Which of the elements do not fall in stair case of the modern periodic table---------?
Si | |
None of the above | |
As | |
Te |
Which of following metals can be displaced by all other metals from its solution ?
Au | |
Cu | |
Ag | |
A |
Which of following is not a base-------?
NH3 | |
KOH | |
BF3 | |
PH3 |
Which molecule have stronger London dispersion forces?
Hydrogen gas | |
Bromine | |
Hydrochloric acid | |
Water |
Which molecule has the highest bond energy among the halogens---------?
Bromine | |
Chlorine | |
Fluorine | |
Iodine |
Which metal is used as a reducing agent in Smelting---?
C | |
. Al | |
u | |
Zn |
Which law states that the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature?
Charles’ Law | |
Avogadro’s Law | |
Graham’s Law | |
Boyle’s law |
Which law states that the rate of the effusion of a gas is inversely proportional to the square root of its density?
Boyle’s law | |
Gay-Lussac’s law | |
Graham’s Law | |
None of these |
Which law states that “equal volumes of all gases, at the same temperature and pressure, have the same number of molecules?
Avogadro’s law | |
Gay-Lussac’s law | |
Boyle’s law | |
Charles’ law |
Which is used for artificial ripening of fruit ?
methane | |
ethane | |
ethyne | |
ethene |