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- Orthophosphorous acid ($H_{3}PO_{3}$): $+3$
- Pyrophosphorous acid ($H_{4}P_{2}O_{5}$): $+3$
- Hypophosphoric acid ($H_{4}P_{2}O_{6}$): $+4$
- Pyrophosphoric acid ($H_{4}P_{2}O_{7}$): $+5$
The concept of Quality of Work Life (QWL) is primarily linked to:
- Job satisfaction
- Employee absenteeism and turnover
- Customer service quality
High QWL is related to job satisfaction, which is a strong predictor of absenteeism and turnover. Investments in improving QWL also pay off in the form of better customer service. All three elements are interconnected in the QWL framework.
Alam Ara (1931), directed by Ardeshir Irani for Imperial Film Company, holds the distinction of being India's first talkie film (a film with a recorded sound track). It was released on 14 March 1931 at Bombay's Majestic Cinema. The film was 10,500 feet long, ran for seven weeks, contained seven songs, and was a romantic costume drama. Its success proved that there was a huge market for “talkies and musicals,” and the entire film industry quickly switched to sound production. Note: Ardeshir Irani also directed Kisan Kanya (1937), which was the first colour film (Option A is therefore incorrect). The first silent feature film of the subcontinent was Raja Harishchandra (1913) by Dadasaheb Phalke. The first Pakistani film after independence was Teri Yaad (1948).
Hear is correct. Hear is a stative verb of perception used for passive, involuntary reception of sound. Listen implies active, intentional attention and requires the preposition “to” (e.g., “listen to someone”). Heard is past tense and grammatically incorrect after can. The sentence describes automatic perception, so hear is the right choice.
Correct Answer: B — hear.
Measurement is the process of assigning numerical values or categories to attributes according to established rules. It is the systematic quantification of characteristics. Evaluation involves making value judgments based on measurement data, and validity refers to accuracy of measurement.
Correct Answer: B — Measurement.
- \(\text{Be(OH)}_2\): reacts with HCl (β BeClβ) and NaOH (β Naβ[Be(OH)β])
- \(\text{Zn(OH)}_2\): reacts with HCl (β ZnClβ) and NaOH (β Naβ[Zn(OH)β])
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