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Study the following statements.
1. A bond formed by the transfer of electrons between atoms of the element is called ionic bond.
2. A bond formed by sharing of electrons between atoms of the elements is called covalent bond.
Which of the statements given above is/are correct?
Which of the following statements regarding an atom are correct? 1) If two atoms with similar ionization potential form a bond, then this bond will most probably be either covalent or metallic. 2) When atoms with different ionization potentials form a bond, the bond will be mainly ionic. 3) If the atom or molecule already has its outer shells completely full, then the bonding between the atoms or molecules will be a secondary bond when it solidifies.
Consider the rules followed for writing the number of electrons in different energy levels or shells: 1. Electrons are not accommodated in a given shell unless the inner shells are filled. 2. The maximum number of electrons present in a shell is given by the formula 2n2. Which among the above statements is/are correct?
All the forms of matter except gases emit electromagnetic radiation continuously. The gases which electrically or thermally excited emit a certain wavelength only, then which of the following is/are true about the process (i) The spacing between the atoms in the other forms of matter is high than in gas (ii) The spacing between the atoms in gases is high than the other forms of matter (iii) The energy of the emitted radiation depends on the spacing between the atoms (iv) The wavelength of the emitted radiation depends on the spacing between the atoms 
The profit – sharing ratio of two partners is 2 : 3 if another partner is added with 40% of the profit – sharing ratio and the profit – sharing ratio of the initial two partners remains the same. Find the new profit – sharing ratio.
In which of the compounds given below, bonding among atoms is explained on the basis of ionic, covalent as well as coordinate covalent bonds ?
Consider the following statements: A characteristic of the structure of metallic atoms is that 1. their outermost orbital of electrons is nearly complete and they attract electrons from other atoms 2. their atoms are smaller and more compact than those of non-metallic elements Which of the above statements is/are correct?
Covalent bonds are formed by bonding between two atoms?
Consider the following statements and choose the correct answer:
1. Adenine pairs with thymine (A : T) and guanine with cytosine $$\left( {G \vdots C} \right)$$
2. Adenine and thymine are joined by three hydrogen bonds through atoms
3. Guanine and cytosine are joined by two hydrogen bonds through atoms
4. The weak hydrogen bonding enables the two strands of the DNA to separate during replication
A bathtub can be filled by 2 inlet pipes in 10 minutes and 15 minutes respectively. A person leaves the tub after opening both the pipes simultaneously and returns at the moment when the tub is expected to get filled. He finds that the drainage pipe was also open so he now closes it. In 3 minutes more, the tub gets filled. What will be the time taken by the drainage pipe to empty a completely filled tub?