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Jaiyush19
Jaiyush19
@jaiyush19
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Joined: Sep 10, 2021
Last seen: Jul 13, 2023
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Topics: 2159 / Replies: 16
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Topic
How does the number of valence electrons vary on moving from left to right: (i) in the first period of the periodic table? (ii) in the second period of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 84
Topic
What happens to the metallic character of the elements as we go down in a group of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 89
Topic
How do the atomic radii of elements change as we go from left to right in a period of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 84
Topic
What is the major characteristic of the first elements in the periods of the periodic table? What is the general name of such elements?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 93
Topic
State whether the following statement is true or false: On going down in a group of the periodic table, the number of valence electrons increases.
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 71
Topic
What is the number of valence electrons in the atoms of first element in a period? (b) What is the usual number of valence electrons in the atoms of the last element in a period?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 74
Topic
What property do all the elements in the same group of the periodic table as fluorine have in common?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 83
Topic
What property do all elements in the same column of the periodic table as boron have in common?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 68
Topic
How does the chemical reactivity of alkali metals vary on going down in group 1 of the periodic table? (b) How does the chemical reactivity of the halogens vary on going down in group 17 of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 89
Topic
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
4 years ago
Forum
Periodic Classification Of Elements
Replies: 0
Views: 90
Topic
Kc for PCl5(g) ⇌ PCl3(g) + Cl2(g) is 0.04 at 250°C. How many moles of PCl5 must be added to a 3L flask to obtain a Cl2 concentration of 0.15 M
4 years ago
Forum
Equilibrium
Replies: 0
Views: 283
Topic
3.2 moles of hydrogen iodide were heated in a sealed bulb at 444°C till the equilibrium state was reached. Its degree of dissociation at this temperature was found to be 22%.
4 years ago
Forum
Equilibrium
Replies: 0
Views: 106
Topic
The partial pressure of CH3OH(g), CO(g), and H2(g) in equilibrium mixture for the reaction, CO(g) + 2H2(g) ⇌ CH3OH(g) are 2.0, 1.0 and 0.1 atm respectively at 427°C.
4 years ago
Forum
Equilibrium
Replies: 0
Views: 134
Topic
In a reaction A + B ⇌ C + D, the initial concentrations, of A and B were 0.9 mol. dm^-3 each. At equilibrium, the concentration of D was found to be 0.6 mol dm^-3. What is the value of equilibrium constant for the reaction
4 years ago
Forum
Equilibrium
Replies: 0
Views: 142
Topic
If 1.0 mole of I2 is introduced into 1.0 litre flask at 1000 K, at equilibrium (Kc = 10^-6), which one is correct
4 years ago
Forum
Equilibrium
Replies: 0
Views: 148
Topic
If K1 and K2 are respective equilibrium constants for the two reactions XeF6(g) + H2O(g) ⇌ XeOF4(g) + 2HF(g) XeO4(g) + XeF6(g) ⇌ XeOF4(g) + XeO3F2(g) the equilibrium constant for the reaction
4 years ago
Forum
Equilibrium
Replies: 0
Views: 191
Topic
For the equilibrium system 2HX(g) ⇌ H2(g) + X2(g) the equilibrium constant is 1.0 × 10^-5. What is the concentration of HX if the equilibrium concentration of H2 and X2 are 1.2 × 10^-3 M, and 1.2 × 10^-4 M respectively.
4 years ago
Forum
Equilibrium
Replies: 0
Views: 146
Topic
One mole of SO3 was placed in a one litre reaction flask at a given temperature when the reaction equilibrium was established in the reaction. 2SO3 ⇌ 2SO2 + O2 The vessel was found to contain 0.6 mole of SO2. The value of the equilibrium constant i...
4 years ago
Forum
Equilibrium
Replies: 0
Views: 143
Topic
Red-green colour blindness in humans is governed by a sex-linked recessive gene. A normal woman whose father was colour blind marries a colour blind man. What proportion of their daughters is expected to be colourblind?
4 years ago
Forum
Biology
Replies: 0
Views: 182
Topic
Crossing over in diploid organism is responsible for
4 years ago
Forum
Biology
Replies: 0
Views: 80
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