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