The partial pressure exerted by the water vapours is called--------?
The partial pressure exerted by the water vapours is called--------?
Surface tension | |
Hydraulic pressure | |
Vapour pressure | |
Aqueous tension |
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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The partial pressure exerted by the water vapours is called--------?
Surface tension | |
Hydraulic pressure | |
Vapour pressure | |
Aqueous tension |
The oxides of beryllium BeO is--------?
Acidic | |
Neutral | |
Basic | |
Amphoteric |
The oxidation state of transition elements is usually ------------?
constant | |
single | |
variable | |
infinite |
The oxidation of isopropyl alcohol will yield----------?
Propanone | |
Propanoic acid | |
propane | |
Propanol |
The oxidation number of central metal atom in [Ni(CO)4] is---------?
0 | |
2 | |
4 | |
6 |
The organic acid that does not has COOH group is----------?
Maleic acid | |
carbolic acid | |
phthalic acid | |
Succinic acid |
The organic acid that can be made from ethanol is---------?
Butanoic acid | |
Acetic acid | |
Citric acid | |
Formic acid |
The ore CaSO4.H2O has the general name--------?
Dolomite | |
Calcite | |
Gypsum | |
Plaster of Paris |
The O-O linkage is present in-----?
H2S2O3 | |
B.H2SO8 | |
H2S4O6 | |
H2 S2 O6 |
The octet rule does not always hold for which of the following elements ---------?
P | |
C | |
O | |
F |
The octane number of zero is assigned to------?
B. n-heptane | |
2-methyl octane | |
C. iso-octane | |
D. 3-methyl octane |
The nutrients which are required in very small amount for the normal growth of plants are called---------?
all of the above | |
micronutrients | |
nitrogenous fertilizers | |
phosphorus fertilizer |
The number of peaks obtained in mass spectrometry shows----------?
Average mass of element | |
Relative isotopic mass | |
Relative abundance | |
Number of isotopes |
The number of moles of CO2 which contains 16 g of oxygen is---------?
0.25 | |
1 | |
0.5 | |
0.75 |
The number of molecules taking part in the rate determining step is called----------?
Mole of a reaction | |
Order of reaction | |
Rate of reaction | |
Extent of a reaction |
The number of lone pairs in XeOF4 is-----?
2 | |
O | |
3 | |
1 |
The number of isotopes of elements with even mass number and even atomic number are --------?
280 | |
300 | |
54 | |
154 |
The number of ions produced by [Pt(NH3)]Cl2?
3 | |
5 | |
2 | |
4 |
The number of fundamental particles in an atom of the lightest isotope carbon are--------?
6 | |
20 | |
18 | |
12 |
The number of formula units in 29.25g of common salt---------?
6.022 x 1023 | |
3.01 x 1023 | |
2 x NA | |
4 x 6.022 x 1023 |
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of------?
C. d-electrons in Fe(Z = 26) | |
B. s-electrons in Mg(Z = 12) | |
D. p-electrons in CI(Z = 17) | |
p-electrons in Ne(Z = 10) |
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in-----?
C. 0.6N H2SO4 | |
1.8 gram of H2O | |
B. 12 moles of KMnO4 | |
D. 4.6 gram of C2H5OH |
The number of atoms in a molecule determines--------?
molecularity | |
macromolecule | |
macromolecule | |
atomicity |
The number amino acid units for each turn of helix on average are----------?
27 | |
25 | |
23 | |
21 |
The nucleus of an atom of every element will always contain----------?
neutrons | |
protons | |
protons and neutrons | |
protons and electrons |