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400 ml of 0.2 M HCl solution is mixed with 100 ml of 0.4 NaOH solution. the pH of the resul†an t solution become

Why are electrons added or liberated added to neutral gaseous atom in electron affinity and ionization energy respectively?

What is the order of bond strength and bond overlap in terms of s-s , s-p , p-p ?Does the angular concentration also determine this?

4g H2 & 127g I2 are mixed & heated in 10 lit closed vessel until equilibrium is reached. If the equilibrium concentration of HI is 0.05 M, total number of moles present at equilibrium is

determine the molecular formula of iron in which mass percent of iron and oxygen are 69.9 and 30.1 respectively.

The materials have conductivity range between 10'(-6) to 10 '(-10) are called

Ascertain the appropriate missing figure by preparing Bills Payable Account from the following information: Bills Payable as on March 31, 2017 Rs. 4,000, Bills discharged Rs. 37,200, Bills payable as on March 31, 2018 Rs. 800.

Question 39Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?

Which of the following is the repeating element in the given pattern?

is each and every thermite reaction is aluino termite reaction?

100 ml of 3 mol H2SO4 reacts with 100 ml of 3 mol NaOH . What is the enthalpy of neutralisation of reaction?

The tastes of vinegar and soap respectively are:

The rate cons†an ts k1 and k2 for two different reactions are 10^{16} .e^{_2000/T} and 10^{15 } .e^{_1000/T} respectively . The temperature at which k1 = k2 i

21. The strength of covalent bond in H2,F2,HF is in order 1)H-H>F-F>H-F 2)H-F>F-F>H-H 3)H-F>H-H>F-F 4)F-F>H-F>H-H

what is electro gain enthalpy?

Question 49 (a) An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants. Identify the element X.

86.A quantity of electricity equal to 3 Faraday is required to electroplate a given metal. If a current of 5 amp is used in the electrolytic cell, how long will it take to electroplate the metal ? (a) 6.70 hr (b) 13.40 hr (c) 26.80 hr (d) 16.08 hr.

Given line, AB is perpendicular to the given line l. What is the difference between CH and FH (in units)?

FeCl3 reacts with ammonium hydroxide to give a reddish brown precipitate of metallic hydroxide which is insoluble in excess of NH4OH. Name this precipitate.

Noble Metals are used to make jewellery because they are very reactive. Do you agree? Give reasons.

Complete and balance the following reaction:CH4(g)+O2(g)→

Molten sodium chloride conducts electricity due to the presence of:

2g of impure calcium carbonate reacts with hcl to produce 410ml of co2 at 1 atm pressure at 27C calculate the percentage purity of the caco3 used

Write the molecular formulae and structure formula of Ethanoic acid.

The reddish-brown fume coming out when lead nitrate is heated is known as

Which among the following is the correct order of ease of dehydration of alcohols?

If r1 is the radius of the first orbit of hydrogen atom, then the radii of second, third and fourth orbits in term of r are

A first order reaction occuring at 300 K has an activation energy of 2.484 kcal/mol. When the temperature is doubled then the rate of the reaction is increased by n times. Find the value of n. (Take ln 2 = 0.69 and R = 2 cal/mol.K)

Match the following: Column A Column B 1. Acid salt A. Sodium sulphate decahydrate 2. Epsom salt B. Basic lead chloride 3. Basic salt C. Sodium carbonate 4. Glauber's salt D. Magnesium sulphate heptahydrate 5. Normal salt E. Sodium hydrogen carbonate

During the contact process, which of these catalysts are used in the converter?

Element X forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be:

In what ratio does sulphur and oxygen need to be added in order to increase the yield of SO2 in the contact process?

35.Why effective nuclear charge increase across the period and decrease down the group.

Two semi-permeable bags containing 2% sucrose placed in two beakers, 'P' containing water and 'Q' containing 10% sucrose. Which one of the following outcomes is true?

33. How to identify KMnO4 as as oxidising agent?? Formula if any how to identify oxidising and reducing agent

The IUPAC name of the given compound is

When SO2 reacts with potassium dichromate, the color of the solution changes to

Why( OH-) that is hydroxyl ion behave as both conjugate acid and as a conjugate base

Calculate ionisation energy of He+ in 3rd orbit

Among the following reactions, which one occurs at the cathode in the Hall–Héroult process?

32. Is pressure and volume is preassumed to be taken constant in chemical reaction and why?

What happens when electricity is passed through acidified water

Write down the changes that will be seen in this instance and explain the reason behind it."A litmus paper was dropped into 2ml dilute HCl. Then 2ml concentrated NaOH was added to it and stirred."

Arrange the following molecules in the increasing order of their atomicity.Chlorine, Oxygen, Sulphur, Phosphorus, Helium, Neon, Argon, Ozone, Hydrogen, Fluorine.

for a reaction, activation energy Ea= 0 and the rate constant at 200 K is 1.6 x 10^6 s^-1. the rate constant at 400 K will be[Given that gas constant, R= 8.314 J K^-1 mol^-1]

What do you observe when (a) an acid is added to a basic solution. (b) ammonium chloride is dissolved in water.

(a) How do the boiling point and melting point change in the homologous series of alcohols? (b) Name the product formed when ethanol reacts with acetic acid. Give an equation. (c) What is the name given to this type of reaction?

Which of the following test can be used to distinguished methanol from ethanol ?